Recent National Weather Service forecasts highlight elevated precipitation probabilities across the Mid-Atlantic and Northeast U.S. on September 21, driven by a slow-moving frontal boundary and anomalously moist air mass supporting showers and embedded thunderstorms. Official guidance from the Weather Prediction Center indicates 50-90% chances of measurable rain in areas from the Ohio Valley through central Appalachians into southern New England, with localized totals potentially exceeding 1 inch where training cells develop. Model consensus points to continued unsettled conditions tied to an approaching upper-level wave, contrasting with drier patterns farther west and in parts of the Southeast. In India, the India Meteorological Department notes widespread monsoon activity with isolated heavy falls possible in coastal states. Traders should monitor updated NWS short-range guidance and radar trends through the evening for shifts in coverage or intensity that could influence resolution thresholds.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedWhere will it rain on September 21?
Where will it rain on September 21?
NEW
Sep 22, 2026
New York, NY
26%
Los Angeles, CA
7%
Chicago, IL
36%
Houston, TX
50%
Dallas, TX
30%
Phoenix, AZ
24%
Philadelphia, PA
36%
Denver, CO
9%
Washington, DC
73%
Atlanta, GA
31%
Miami, FL
85%
Seattle, WA
4%
Boston, MA
36%
New Orleans, LA
40%
San Francisco, CA
25%
$1,196 Vol.
New York, NY
$181 Vol.
26%
Los Angeles, CA
$60 Vol.
7%
Chicago, IL
$0 Vol.
36%
Houston, TX
$0 Vol.
50%
Dallas, TX
$4 Vol.
30%
Phoenix, AZ
$379 Vol.
24%
Philadelphia, PA
$27 Vol.
36%
Denver, CO
$0 Vol.
9%
Washington, DC
$0 Vol.
73%
Atlanta, GA
$0 Vol.
31%
Miami, FL
$20 Vol.
85%
Seattle, WA
$246 Vol.
4%
Boston, MA
$49 Vol.
36%
New Orleans, LA
$10 Vol.
40%
San Francisco, CA
$220 Vol.
25%
This market will resolve to "Yes" if New York, NY records measurable precipitation on September 21, 2026. Otherwise, this market will resolve to "No".
Measurable precipitation means 0.01 inches or more as reported by the PRECIPITATION (IN) figure in the NWS Daily Climate Report (CLI) for the city's station.
A report of trace ("T") does not qualify.
The PRECIPITATION (IN) figure measures total liquid-equivalent precipitation and does not distinguish between precipitation types.
The observation period is the NWS climate day for KNYC: midnight to midnight local standard time. The final CLI report for a climate day is issued the following morning.
This market will resolve according to the NWS Daily Climate Report as published by 2:00 PM ET on the day following the observation date. If multiple versions of the report are issued, the last version published before that time governs. If no figure has been published by that time, this market will resolve to "No".
The resolution source for this market is the NWS Daily Climate Report (CLI) for KNYC, published at https://forecast.weather.gov/product.php?site=NWS&product=CLI&issuedby=NYC.This market will resolve to "Yes" if Los Angeles, CA records measurable precipitation on September 21, 2026. Otherwise, this market will resolve to "No".
Measurable precipitation means 0.01 inches or more as reported by the PRECIPITATION (IN) figure in the NWS Daily Climate Report (CLI) for the city's station.
A report of trace ("T") does not qualify.
The PRECIPITATION (IN) figure measures total liquid-equivalent precipitation and does not distinguish between precipitation types.
The observation period is the NWS climate day for KLAX: midnight to midnight local standard time. The final CLI report for a climate day is issued the following morning.
This market will resolve according to the NWS Daily Climate Report as published by 2:00 PM ET on the day following the observation date. If multiple versions of the report are issued, the last version published before that time governs. If no figure has been published by that time, this market will resolve to "No".
The resolution source for this market is the NWS Daily Climate Report (CLI) for KLAX, published at https://forecast.weather.gov/product.php?site=NWS&product=CLI&issuedby=LAX.This market will resolve to "Yes" if Chicago, IL records measurable precipitation on September 21, 2026. Otherwise, this market will resolve to "No".
Measurable precipitation means 0.01 inches or more as reported by the PRECIPITATION (IN) figure in the NWS Daily Climate Report (CLI) for the city's station.
A report of trace ("T") does not qualify.
The PRECIPITATION (IN) figure measures total liquid-equivalent precipitation and does not distinguish between precipitation types.
The observation period is the NWS climate day for KMDW: midnight to midnight local standard time. The final CLI report for a climate day is issued the following morning.
This market will resolve according to the NWS Daily Climate Report as published by 2:00 PM ET on the day following the observation date. If multiple versions of the report are issued, the last version published before that time governs. If no figure has been published by that time, this market will resolve to "No".
The resolution source for this market is the NWS Daily Climate Report (CLI) for KMDW, published at https://forecast.weather.gov/product.php?site=NWS&product=CLI&issuedby=MDW.This market will resolve to "Yes" if Houston, TX records measurable precipitation on September 21, 2026. Otherwise, this market will resolve to "No".
Measurable precipitation means 0.01 inches or more as reported by the PRECIPITATION (IN) figure in the NWS Daily Climate Report (CLI) for the city's station.
A report of trace ("T") does not qualify.
The PRECIPITATION (IN) figure measures total liquid-equivalent precipitation and does not distinguish between precipitation types.
The observation period is the NWS climate day for KIAH: midnight to midnight local standard time. The final CLI report for a climate day is issued the following morning.
This market will resolve according to the NWS Daily Climate Report as published by 2:00 PM ET on the day following the observation date. If multiple versions of the report are issued, the last version published before that time governs. If no figure has been published by that time, this market will resolve to "No".
The resolution source for this market is the NWS Daily Climate Report (CLI) for KIAH, published at https://forecast.weather.gov/product.php?site=NWS&product=CLI&issuedby=IAH.This market will resolve to "Yes" if Dallas, TX records measurable precipitation on September 21, 2026. Otherwise, this market will resolve to "No".
Measurable precipitation means 0.01 inches or more as reported by the PRECIPITATION (IN) figure in the NWS Daily Climate Report (CLI) for the city's station.
A report of trace ("T") does not qualify.
The PRECIPITATION (IN) figure measures total liquid-equivalent precipitation and does not distinguish between precipitation types.
The observation period is the NWS climate day for KDFW: midnight to midnight local standard time. The final CLI report for a climate day is issued the following morning.
This market will resolve according to the NWS Daily Climate Report as published by 2:00 PM ET on the day following the observation date. If multiple versions of the report are issued, the last version published before that time governs. If no figure has been published by that time, this market will resolve to "No".
The resolution source for this market is the NWS Daily Climate Report (CLI) for KDFW, published at https://forecast.weather.gov/product.php?site=NWS&product=CLI&issuedby=DFW.This market will resolve to "Yes" if Phoenix, AZ records measurable precipitation on September 21, 2026. Otherwise, this market will resolve to "No".
Measurable precipitation means 0.01 inches or more as reported by the PRECIPITATION (IN) figure in the NWS Daily Climate Report (CLI) for the city's station.
A report of trace ("T") does not qualify.
The PRECIPITATION (IN) figure measures total liquid-equivalent precipitation and does not distinguish between precipitation types.
The observation period is the NWS climate day for KPHX: midnight to midnight local standard time. The final CLI report for a climate day is issued the following morning.
This market will resolve according to the NWS Daily Climate Report as published by 2:00 PM ET on the day following the observation date. If multiple versions of the report are issued, the last version published before that time governs. If no figure has been published by that time, this market will resolve to "No".
The resolution source for this market is the NWS Daily Climate Report (CLI) for KPHX, published at https://forecast.weather.gov/product.php?site=NWS&product=CLI&issuedby=PHX.This market will resolve to "Yes" if Philadelphia, PA records measurable precipitation on September 21, 2026. Otherwise, this market will resolve to "No".
Measurable precipitation means 0.01 inches or more as reported by the PRECIPITATION (IN) figure in the NWS Daily Climate Report (CLI) for the city's station.
A report of trace ("T") does not qualify.
The PRECIPITATION (IN) figure measures total liquid-equivalent precipitation and does not distinguish between precipitation types.
The observation period is the NWS climate day for KPHL: midnight to midnight local standard time. The final CLI report for a climate day is issued the following morning.
This market will resolve according to the NWS Daily Climate Report as published by 2:00 PM ET on the day following the observation date. If multiple versions of the report are issued, the last version published before that time governs. If no figure has been published by that time, this market will resolve to "No".
The resolution source for this market is the NWS Daily Climate Report (CLI) for KPHL, published at https://forecast.weather.gov/product.php?site=NWS&product=CLI&issuedby=PHL.This market will resolve to "Yes" if Denver, CO records measurable precipitation on September 21, 2026. Otherwise, this market will resolve to "No".
Measurable precipitation means 0.01 inches or more as reported by the PRECIPITATION (IN) figure in the NWS Daily Climate Report (CLI) for the city's station.
A report of trace ("T") does not qualify.
The PRECIPITATION (IN) figure measures total liquid-equivalent precipitation and does not distinguish between precipitation types.
The observation period is the NWS climate day for KDEN: midnight to midnight local standard time. The final CLI report for a climate day is issued the following morning.
This market will resolve according to the NWS Daily Climate Report as published by 2:00 PM ET on the day following the observation date. If multiple versions of the report are issued, the last version published before that time governs. If no figure has been published by that time, this market will resolve to "No".
The resolution source for this market is the NWS Daily Climate Report (CLI) for KDEN, published at https://forecast.weather.gov/product.php?site=NWS&product=CLI&issuedby=DEN.This market will resolve to "Yes" if Washington, DC records measurable precipitation on September 21, 2026. Otherwise, this market will resolve to "No".
Measurable precipitation means 0.01 inches or more as reported by the PRECIPITATION (IN) figure in the NWS Daily Climate Report (CLI) for the city's station.
A report of trace ("T") does not qualify.
The PRECIPITATION (IN) figure measures total liquid-equivalent precipitation and does not distinguish between precipitation types.
The observation period is the NWS climate day for KDCA: midnight to midnight local standard time. The final CLI report for a climate day is issued the following morning.
This market will resolve according to the NWS Daily Climate Report as published by 2:00 PM ET on the day following the observation date. If multiple versions of the report are issued, the last version published before that time governs. If no figure has been published by that time, this market will resolve to "No".
The resolution source for this market is the NWS Daily Climate Report (CLI) for KDCA, published at https://forecast.weather.gov/product.php?site=NWS&product=CLI&issuedby=DCA.This market will resolve to "Yes" if Atlanta, GA records measurable precipitation on September 21, 2026. Otherwise, this market will resolve to "No".
Measurable precipitation means 0.01 inches or more as reported by the PRECIPITATION (IN) figure in the NWS Daily Climate Report (CLI) for the city's station.
A report of trace ("T") does not qualify.
The PRECIPITATION (IN) figure measures total liquid-equivalent precipitation and does not distinguish between precipitation types.
The observation period is the NWS climate day for KATL: midnight to midnight local standard time. The final CLI report for a climate day is issued the following morning.
This market will resolve according to the NWS Daily Climate Report as published by 2:00 PM ET on the day following the observation date. If multiple versions of the report are issued, the last version published before that time governs. If no figure has been published by that time, this market will resolve to "No".
The resolution source for this market is the NWS Daily Climate Report (CLI) for KATL, published at https://forecast.weather.gov/product.php?site=NWS&product=CLI&issuedby=ATL.This market will resolve to "Yes" if Miami, FL records measurable precipitation on September 21, 2026. Otherwise, this market will resolve to "No".
Measurable precipitation means 0.01 inches or more as reported by the PRECIPITATION (IN) figure in the NWS Daily Climate Report (CLI) for the city's station.
A report of trace ("T") does not qualify.
The PRECIPITATION (IN) figure measures total liquid-equivalent precipitation and does not distinguish between precipitation types.
The observation period is the NWS climate day for KMIA: midnight to midnight local standard time. The final CLI report for a climate day is issued the following morning.
This market will resolve according to the NWS Daily Climate Report as published by 2:00 PM ET on the day following the observation date. If multiple versions of the report are issued, the last version published before that time governs. If no figure has been published by that time, this market will resolve to "No".
The resolution source for this market is the NWS Daily Climate Report (CLI) for KMIA, published at https://forecast.weather.gov/product.php?site=NWS&product=CLI&issuedby=MIA.This market will resolve to "Yes" if Seattle, WA records measurable precipitation on September 21, 2026. Otherwise, this market will resolve to "No".
Measurable precipitation means 0.01 inches or more as reported by the PRECIPITATION (IN) figure in the NWS Daily Climate Report (CLI) for the city's station.
A report of trace ("T") does not qualify.
The PRECIPITATION (IN) figure measures total liquid-equivalent precipitation and does not distinguish between precipitation types.
The observation period is the NWS climate day for KSEA: midnight to midnight local standard time. The final CLI report for a climate day is issued the following morning.
This market will resolve according to the NWS Daily Climate Report as published by 2:00 PM ET on the day following the observation date. If multiple versions of the report are issued, the last version published before that time governs. If no figure has been published by that time, this market will resolve to "No".
The resolution source for this market is the NWS Daily Climate Report (CLI) for KSEA, published at https://forecast.weather.gov/product.php?site=NWS&product=CLI&issuedby=SEA.This market will resolve to "Yes" if Boston, MA records measurable precipitation on September 21, 2026. Otherwise, this market will resolve to "No".
Measurable precipitation means 0.01 inches or more as reported by the PRECIPITATION (IN) figure in the NWS Daily Climate Report (CLI) for the city's station.
A report of trace ("T") does not qualify.
The PRECIPITATION (IN) figure measures total liquid-equivalent precipitation and does not distinguish between precipitation types.
The observation period is the NWS climate day for KBOS: midnight to midnight local standard time. The final CLI report for a climate day is issued the following morning.
This market will resolve according to the NWS Daily Climate Report as published by 2:00 PM ET on the day following the observation date. If multiple versions of the report are issued, the last version published before that time governs. If no figure has been published by that time, this market will resolve to "No".
The resolution source for this market is the NWS Daily Climate Report (CLI) for KBOS, published at https://forecast.weather.gov/product.php?site=NWS&product=CLI&issuedby=BOS.This market will resolve to "Yes" if New Orleans, LA records measurable precipitation on September 21, 2026. Otherwise, this market will resolve to "No".
Measurable precipitation means 0.01 inches or more as reported by the PRECIPITATION (IN) figure in the NWS Daily Climate Report (CLI) for the city's station.
A report of trace ("T") does not qualify.
The PRECIPITATION (IN) figure measures total liquid-equivalent precipitation and does not distinguish between precipitation types.
The observation period is the NWS climate day for KMSY: midnight to midnight local standard time. The final CLI report for a climate day is issued the following morning.
This market will resolve according to the NWS Daily Climate Report as published by 2:00 PM ET on the day following the observation date. If multiple versions of the report are issued, the last version published before that time governs. If no figure has been published by that time, this market will resolve to "No".
The resolution source for this market is the NWS Daily Climate Report (CLI) for KMSY, published at https://forecast.weather.gov/product.php?site=NWS&product=CLI&issuedby=MSY.This market will resolve to "Yes" if San Francisco, CA records measurable precipitation on September 21, 2026. Otherwise, this market will resolve to "No".
Measurable precipitation means 0.01 inches or more as reported by the PRECIPITATION (IN) figure in the NWS Daily Climate Report (CLI) for the city's station.
A report of trace ("T") does not qualify.
The PRECIPITATION (IN) figure measures total liquid-equivalent precipitation and does not distinguish between precipitation types.
The observation period is the NWS climate day for KSFO: midnight to midnight local standard time. The final CLI report for a climate day is issued the following morning.
This market will resolve according to the NWS Daily Climate Report as published by 2:00 PM ET on the day following the observation date. If multiple versions of the report are issued, the last version published before that time governs. If no figure has been published by that time, this market will resolve to "No".
The resolution source for this market is the NWS Daily Climate Report (CLI) for KSFO, published at https://forecast.weather.gov/product.php?site=NWS&product=CLI&issuedby=SFO.Recent National Weather Service forecasts highlight elevated precipitation probabilities across the Mid-Atlantic and Northeast U.S. on September 21, driven by a slow-moving frontal boundary and anomalously moist air mass supporting showers and embedded thunderstorms. Official guidance from the Weather Prediction Center indicates 50-90% chances of measurable rain in areas from the Ohio Valley through central Appalachians into southern New England, with localized totals potentially exceeding 1 inch where training cells develop. Model consensus points to continued unsettled conditions tied to an approaching upper-level wave, contrasting with drier patterns farther west and in parts of the Southeast. In India, the India Meteorological Department notes widespread monsoon activity with isolated heavy falls possible in coastal states. Traders should monitor updated NWS short-range guidance and radar trends through the evening for shifts in coverage or intensity that could influence resolution thresholds.
This market will resolve to "Yes" if New York, NY records measurable precipitation on September 21, 2026. Otherwise, this market will resolve to "No".
Measurable precipitation means 0.01 inches or more as reported by the PRECIPITATION (IN) figure in the NWS Daily Climate Report (CLI) for the city's station.
A report of trace ("T") does not qualify.
The PRECIPITATION (IN) figure measures total liquid-equivalent precipitation and does not distinguish between precipitation types.
The observation period is the NWS climate day for KNYC: midnight to midnight local standard time. The final CLI report for a climate day is issued the following morning.
This market will resolve according to the NWS Daily Climate Report as published by 2:00 PM ET on the day following the observation date. If multiple versions of the report are issued, the last version published before that time governs. If no figure has been published by that time, this market will resolve to "No".
The resolution source for this market is the NWS Daily Climate Report (CLI) for KNYC, published at https://forecast.weather.gov/product.php?site=NWS&product=CLI&issuedby=NYC.
Measurable precipitation means 0.01 inches or more as reported by the PRECIPITATION (IN) figure in the NWS Daily Climate Report (CLI) for the city's station.
A report of trace ("T") does not qualify.
The PRECIPITATION (IN) figure measures total liquid-equivalent precipitation and does not distinguish between precipitation types.
The observation period is the NWS climate day for KNYC: midnight to midnight local standard time. The final CLI report for a climate day is issued the following morning.
This market will resolve according to the NWS Daily Climate Report as published by 2:00 PM ET on the day following the observation date. If multiple versions of the report are issued, the last version published before that time governs. If no figure has been published by that time, this market will resolve to "No".
The resolution source for this market is the NWS Daily Climate Report (CLI) for KNYC, published at https://forecast.weather.gov/product.php?site=NWS&product=CLI&issuedby=NYC.
Market Opened: Sep 20, 2026, 7:09 AM ET
Volume
$1,196End Date
Sep 22, 2026Market Opened
Sep 20, 2026, 7:09 AM ETResolver
0x65070BE91...This market will resolve to "Yes" if New York, NY records measurable precipitation on September 21, 2026. Otherwise, this market will resolve to "No".
Measurable precipitation means 0.01 inches or more as reported by the PRECIPITATION (IN) figure in the NWS Daily Climate Report (CLI) for the city's station.
A report of trace ("T") does not qualify.
The PRECIPITATION (IN) figure measures total liquid-equivalent precipitation and does not distinguish between precipitation types.
The observation period is the NWS climate day for KNYC: midnight to midnight local standard time. The final CLI report for a climate day is issued the following morning.
This market will resolve according to the NWS Daily Climate Report as published by 2:00 PM ET on the day following the observation date. If multiple versions of the report are issued, the last version published before that time governs. If no figure has been published by that time, this market will resolve to "No".
The resolution source for this market is the NWS Daily Climate Report (CLI) for KNYC, published at https://forecast.weather.gov/product.php?site=NWS&product=CLI&issuedby=NYC.This market will resolve to "Yes" if Los Angeles, CA records measurable precipitation on September 21, 2026. Otherwise, this market will resolve to "No".
Measurable precipitation means 0.01 inches or more as reported by the PRECIPITATION (IN) figure in the NWS Daily Climate Report (CLI) for the city's station.
A report of trace ("T") does not qualify.
The PRECIPITATION (IN) figure measures total liquid-equivalent precipitation and does not distinguish between precipitation types.
The observation period is the NWS climate day for KLAX: midnight to midnight local standard time. The final CLI report for a climate day is issued the following morning.
This market will resolve according to the NWS Daily Climate Report as published by 2:00 PM ET on the day following the observation date. If multiple versions of the report are issued, the last version published before that time governs. If no figure has been published by that time, this market will resolve to "No".
The resolution source for this market is the NWS Daily Climate Report (CLI) for KLAX, published at https://forecast.weather.gov/product.php?site=NWS&product=CLI&issuedby=LAX.This market will resolve to "Yes" if Chicago, IL records measurable precipitation on September 21, 2026. Otherwise, this market will resolve to "No".
Measurable precipitation means 0.01 inches or more as reported by the PRECIPITATION (IN) figure in the NWS Daily Climate Report (CLI) for the city's station.
A report of trace ("T") does not qualify.
The PRECIPITATION (IN) figure measures total liquid-equivalent precipitation and does not distinguish between precipitation types.
The observation period is the NWS climate day for KMDW: midnight to midnight local standard time. The final CLI report for a climate day is issued the following morning.
This market will resolve according to the NWS Daily Climate Report as published by 2:00 PM ET on the day following the observation date. If multiple versions of the report are issued, the last version published before that time governs. If no figure has been published by that time, this market will resolve to "No".
The resolution source for this market is the NWS Daily Climate Report (CLI) for KMDW, published at https://forecast.weather.gov/product.php?site=NWS&product=CLI&issuedby=MDW.This market will resolve to "Yes" if Houston, TX records measurable precipitation on September 21, 2026. Otherwise, this market will resolve to "No".
Measurable precipitation means 0.01 inches or more as reported by the PRECIPITATION (IN) figure in the NWS Daily Climate Report (CLI) for the city's station.
A report of trace ("T") does not qualify.
The PRECIPITATION (IN) figure measures total liquid-equivalent precipitation and does not distinguish between precipitation types.
The observation period is the NWS climate day for KIAH: midnight to midnight local standard time. The final CLI report for a climate day is issued the following morning.
This market will resolve according to the NWS Daily Climate Report as published by 2:00 PM ET on the day following the observation date. If multiple versions of the report are issued, the last version published before that time governs. If no figure has been published by that time, this market will resolve to "No".
The resolution source for this market is the NWS Daily Climate Report (CLI) for KIAH, published at https://forecast.weather.gov/product.php?site=NWS&product=CLI&issuedby=IAH.This market will resolve to "Yes" if Dallas, TX records measurable precipitation on September 21, 2026. Otherwise, this market will resolve to "No".
Measurable precipitation means 0.01 inches or more as reported by the PRECIPITATION (IN) figure in the NWS Daily Climate Report (CLI) for the city's station.
A report of trace ("T") does not qualify.
The PRECIPITATION (IN) figure measures total liquid-equivalent precipitation and does not distinguish between precipitation types.
The observation period is the NWS climate day for KDFW: midnight to midnight local standard time. The final CLI report for a climate day is issued the following morning.
This market will resolve according to the NWS Daily Climate Report as published by 2:00 PM ET on the day following the observation date. If multiple versions of the report are issued, the last version published before that time governs. If no figure has been published by that time, this market will resolve to "No".
The resolution source for this market is the NWS Daily Climate Report (CLI) for KDFW, published at https://forecast.weather.gov/product.php?site=NWS&product=CLI&issuedby=DFW.This market will resolve to "Yes" if Phoenix, AZ records measurable precipitation on September 21, 2026. Otherwise, this market will resolve to "No".
Measurable precipitation means 0.01 inches or more as reported by the PRECIPITATION (IN) figure in the NWS Daily Climate Report (CLI) for the city's station.
A report of trace ("T") does not qualify.
The PRECIPITATION (IN) figure measures total liquid-equivalent precipitation and does not distinguish between precipitation types.
The observation period is the NWS climate day for KPHX: midnight to midnight local standard time. The final CLI report for a climate day is issued the following morning.
This market will resolve according to the NWS Daily Climate Report as published by 2:00 PM ET on the day following the observation date. If multiple versions of the report are issued, the last version published before that time governs. If no figure has been published by that time, this market will resolve to "No".
The resolution source for this market is the NWS Daily Climate Report (CLI) for KPHX, published at https://forecast.weather.gov/product.php?site=NWS&product=CLI&issuedby=PHX.This market will resolve to "Yes" if Philadelphia, PA records measurable precipitation on September 21, 2026. Otherwise, this market will resolve to "No".
Measurable precipitation means 0.01 inches or more as reported by the PRECIPITATION (IN) figure in the NWS Daily Climate Report (CLI) for the city's station.
A report of trace ("T") does not qualify.
The PRECIPITATION (IN) figure measures total liquid-equivalent precipitation and does not distinguish between precipitation types.
The observation period is the NWS climate day for KPHL: midnight to midnight local standard time. The final CLI report for a climate day is issued the following morning.
This market will resolve according to the NWS Daily Climate Report as published by 2:00 PM ET on the day following the observation date. If multiple versions of the report are issued, the last version published before that time governs. If no figure has been published by that time, this market will resolve to "No".
The resolution source for this market is the NWS Daily Climate Report (CLI) for KPHL, published at https://forecast.weather.gov/product.php?site=NWS&product=CLI&issuedby=PHL.This market will resolve to "Yes" if Denver, CO records measurable precipitation on September 21, 2026. Otherwise, this market will resolve to "No".
Measurable precipitation means 0.01 inches or more as reported by the PRECIPITATION (IN) figure in the NWS Daily Climate Report (CLI) for the city's station.
A report of trace ("T") does not qualify.
The PRECIPITATION (IN) figure measures total liquid-equivalent precipitation and does not distinguish between precipitation types.
The observation period is the NWS climate day for KDEN: midnight to midnight local standard time. The final CLI report for a climate day is issued the following morning.
This market will resolve according to the NWS Daily Climate Report as published by 2:00 PM ET on the day following the observation date. If multiple versions of the report are issued, the last version published before that time governs. If no figure has been published by that time, this market will resolve to "No".
The resolution source for this market is the NWS Daily Climate Report (CLI) for KDEN, published at https://forecast.weather.gov/product.php?site=NWS&product=CLI&issuedby=DEN.This market will resolve to "Yes" if Washington, DC records measurable precipitation on September 21, 2026. Otherwise, this market will resolve to "No".
Measurable precipitation means 0.01 inches or more as reported by the PRECIPITATION (IN) figure in the NWS Daily Climate Report (CLI) for the city's station.
A report of trace ("T") does not qualify.
The PRECIPITATION (IN) figure measures total liquid-equivalent precipitation and does not distinguish between precipitation types.
The observation period is the NWS climate day for KDCA: midnight to midnight local standard time. The final CLI report for a climate day is issued the following morning.
This market will resolve according to the NWS Daily Climate Report as published by 2:00 PM ET on the day following the observation date. If multiple versions of the report are issued, the last version published before that time governs. If no figure has been published by that time, this market will resolve to "No".
The resolution source for this market is the NWS Daily Climate Report (CLI) for KDCA, published at https://forecast.weather.gov/product.php?site=NWS&product=CLI&issuedby=DCA.This market will resolve to "Yes" if Atlanta, GA records measurable precipitation on September 21, 2026. Otherwise, this market will resolve to "No".
Measurable precipitation means 0.01 inches or more as reported by the PRECIPITATION (IN) figure in the NWS Daily Climate Report (CLI) for the city's station.
A report of trace ("T") does not qualify.
The PRECIPITATION (IN) figure measures total liquid-equivalent precipitation and does not distinguish between precipitation types.
The observation period is the NWS climate day for KATL: midnight to midnight local standard time. The final CLI report for a climate day is issued the following morning.
This market will resolve according to the NWS Daily Climate Report as published by 2:00 PM ET on the day following the observation date. If multiple versions of the report are issued, the last version published before that time governs. If no figure has been published by that time, this market will resolve to "No".
The resolution source for this market is the NWS Daily Climate Report (CLI) for KATL, published at https://forecast.weather.gov/product.php?site=NWS&product=CLI&issuedby=ATL.This market will resolve to "Yes" if Miami, FL records measurable precipitation on September 21, 2026. Otherwise, this market will resolve to "No".
Measurable precipitation means 0.01 inches or more as reported by the PRECIPITATION (IN) figure in the NWS Daily Climate Report (CLI) for the city's station.
A report of trace ("T") does not qualify.
The PRECIPITATION (IN) figure measures total liquid-equivalent precipitation and does not distinguish between precipitation types.
The observation period is the NWS climate day for KMIA: midnight to midnight local standard time. The final CLI report for a climate day is issued the following morning.
This market will resolve according to the NWS Daily Climate Report as published by 2:00 PM ET on the day following the observation date. If multiple versions of the report are issued, the last version published before that time governs. If no figure has been published by that time, this market will resolve to "No".
The resolution source for this market is the NWS Daily Climate Report (CLI) for KMIA, published at https://forecast.weather.gov/product.php?site=NWS&product=CLI&issuedby=MIA.This market will resolve to "Yes" if Seattle, WA records measurable precipitation on September 21, 2026. Otherwise, this market will resolve to "No".
Measurable precipitation means 0.01 inches or more as reported by the PRECIPITATION (IN) figure in the NWS Daily Climate Report (CLI) for the city's station.
A report of trace ("T") does not qualify.
The PRECIPITATION (IN) figure measures total liquid-equivalent precipitation and does not distinguish between precipitation types.
The observation period is the NWS climate day for KSEA: midnight to midnight local standard time. The final CLI report for a climate day is issued the following morning.
This market will resolve according to the NWS Daily Climate Report as published by 2:00 PM ET on the day following the observation date. If multiple versions of the report are issued, the last version published before that time governs. If no figure has been published by that time, this market will resolve to "No".
The resolution source for this market is the NWS Daily Climate Report (CLI) for KSEA, published at https://forecast.weather.gov/product.php?site=NWS&product=CLI&issuedby=SEA.This market will resolve to "Yes" if Boston, MA records measurable precipitation on September 21, 2026. Otherwise, this market will resolve to "No".
Measurable precipitation means 0.01 inches or more as reported by the PRECIPITATION (IN) figure in the NWS Daily Climate Report (CLI) for the city's station.
A report of trace ("T") does not qualify.
The PRECIPITATION (IN) figure measures total liquid-equivalent precipitation and does not distinguish between precipitation types.
The observation period is the NWS climate day for KBOS: midnight to midnight local standard time. The final CLI report for a climate day is issued the following morning.
This market will resolve according to the NWS Daily Climate Report as published by 2:00 PM ET on the day following the observation date. If multiple versions of the report are issued, the last version published before that time governs. If no figure has been published by that time, this market will resolve to "No".
The resolution source for this market is the NWS Daily Climate Report (CLI) for KBOS, published at https://forecast.weather.gov/product.php?site=NWS&product=CLI&issuedby=BOS.This market will resolve to "Yes" if New Orleans, LA records measurable precipitation on September 21, 2026. Otherwise, this market will resolve to "No".
Measurable precipitation means 0.01 inches or more as reported by the PRECIPITATION (IN) figure in the NWS Daily Climate Report (CLI) for the city's station.
A report of trace ("T") does not qualify.
The PRECIPITATION (IN) figure measures total liquid-equivalent precipitation and does not distinguish between precipitation types.
The observation period is the NWS climate day for KMSY: midnight to midnight local standard time. The final CLI report for a climate day is issued the following morning.
This market will resolve according to the NWS Daily Climate Report as published by 2:00 PM ET on the day following the observation date. If multiple versions of the report are issued, the last version published before that time governs. If no figure has been published by that time, this market will resolve to "No".
The resolution source for this market is the NWS Daily Climate Report (CLI) for KMSY, published at https://forecast.weather.gov/product.php?site=NWS&product=CLI&issuedby=MSY.This market will resolve to "Yes" if San Francisco, CA records measurable precipitation on September 21, 2026. Otherwise, this market will resolve to "No".
Measurable precipitation means 0.01 inches or more as reported by the PRECIPITATION (IN) figure in the NWS Daily Climate Report (CLI) for the city's station.
A report of trace ("T") does not qualify.
The PRECIPITATION (IN) figure measures total liquid-equivalent precipitation and does not distinguish between precipitation types.
The observation period is the NWS climate day for KSFO: midnight to midnight local standard time. The final CLI report for a climate day is issued the following morning.
This market will resolve according to the NWS Daily Climate Report as published by 2:00 PM ET on the day following the observation date. If multiple versions of the report are issued, the last version published before that time governs. If no figure has been published by that time, this market will resolve to "No".
The resolution source for this market is the NWS Daily Climate Report (CLI) for KSFO, published at https://forecast.weather.gov/product.php?site=NWS&product=CLI&issuedby=SFO.Recent National Weather Service forecasts highlight elevated precipitation probabilities across the Mid-Atlantic and Northeast U.S. on September 21, driven by a slow-moving frontal boundary and anomalously moist air mass supporting showers and embedded thunderstorms. Official guidance from the Weather Prediction Center indicates 50-90% chances of measurable rain in areas from the Ohio Valley through central Appalachians into southern New England, with localized totals potentially exceeding 1 inch where training cells develop. Model consensus points to continued unsettled conditions tied to an approaching upper-level wave, contrasting with drier patterns farther west and in parts of the Southeast. In India, the India Meteorological Department notes widespread monsoon activity with isolated heavy falls possible in coastal states. Traders should monitor updated NWS short-range guidance and radar trends through the evening for shifts in coverage or intensity that could influence resolution thresholds.
This market will resolve to "Yes" if New York, NY records measurable precipitation on September 21, 2026. Otherwise, this market will resolve to "No".
Measurable precipitation means 0.01 inches or more as reported by the PRECIPITATION (IN) figure in the NWS Daily Climate Report (CLI) for the city's station.
A report of trace ("T") does not qualify.
The PRECIPITATION (IN) figure measures total liquid-equivalent precipitation and does not distinguish between precipitation types.
The observation period is the NWS climate day for KNYC: midnight to midnight local standard time. The final CLI report for a climate day is issued the following morning.
This market will resolve according to the NWS Daily Climate Report as published by 2:00 PM ET on the day following the observation date. If multiple versions of the report are issued, the last version published before that time governs. If no figure has been published by that time, this market will resolve to "No".
The resolution source for this market is the NWS Daily Climate Report (CLI) for KNYC, published at https://forecast.weather.gov/product.php?site=NWS&product=CLI&issuedby=NYC.
Measurable precipitation means 0.01 inches or more as reported by the PRECIPITATION (IN) figure in the NWS Daily Climate Report (CLI) for the city's station.
A report of trace ("T") does not qualify.
The PRECIPITATION (IN) figure measures total liquid-equivalent precipitation and does not distinguish between precipitation types.
The observation period is the NWS climate day for KNYC: midnight to midnight local standard time. The final CLI report for a climate day is issued the following morning.
This market will resolve according to the NWS Daily Climate Report as published by 2:00 PM ET on the day following the observation date. If multiple versions of the report are issued, the last version published before that time governs. If no figure has been published by that time, this market will resolve to "No".
The resolution source for this market is the NWS Daily Climate Report (CLI) for KNYC, published at https://forecast.weather.gov/product.php?site=NWS&product=CLI&issuedby=NYC.
Volume
$1,196End Date
Sep 22, 2026Market Opened
Sep 20, 2026, 7:09 AM ETResolver
0x65070BE91...Recent National Weather Service forecasts highlight elevated precipitation probabilities across the Mid-Atlantic and Northeast U.S. on September 21, driven by a slow-moving frontal boundary and anomalously moist air mass supporting showers and embedded thunderstorms. Official guidance from the Weather Prediction Center indicates 50-90% chances of measurable rain in areas from the Ohio Valley through central Appalachians into southern New England, with localized totals potentially exceeding 1 inch where training cells develop. Model consensus points to continued unsettled conditions tied to an approaching upper-level wave, contrasting with drier patterns farther west and in parts of the Southeast. In India, the India Meteorological Department notes widespread monsoon activity with isolated heavy falls possible in coastal states. Traders should monitor updated NWS short-range guidance and radar trends through the evening for shifts in coverage or intensity that could influence resolution thresholds.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
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Frequently Asked Questions