Official forecasts from the National Weather Service and Weather Prediction Center highlight a warm front and associated moisture surge with precipitable water values reaching 2–2.25 inches as the main driver of elevated rain probabilities across the Northeast and Midwest on September 13, 2026. Model consensus points to efficient warm-rain processes and potential excessive rainfall in corridors from the NYC metro northward and into the Missouri River Valley, though exact placement and totals retain uncertainty typical of mesoscale convective systems. Historical analogs for mid-September frontal passages and current ensemble spreads inform trader assessments of localized versus widespread precipitation. Updated Day 2 excessive rainfall outlooks and morning model runs represent key near-term data releases that could shift implied probabilities ahead of market resolution.
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 13?
New York, NY
92%
Los Angeles, CA
7%
Chicago, IL
50%
Houston, TX
50%
Dallas, TX
7%
Phoenix, AZ
24%
Philadelphia, PA
82%
Denver, CO
25%
Washington, DC
67%
Atlanta, GA
21%
Miami, FL
70%
Seattle, WA
89%
Boston, MA
89%
New Orleans, LA
26%
San Francisco, CA
7%
$172 Vol.
New York, NY
92%
Los Angeles, CA
7%
Chicago, IL
50%
Houston, TX
50%
Dallas, TX
7%
Phoenix, AZ
24%
Philadelphia, PA
82%
Denver, CO
25%
Washington, DC
67%
Atlanta, GA
21%
Miami, FL
70%
Seattle, WA
89%
Boston, MA
89%
New Orleans, LA
26%
San Francisco, CA
7%
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 12, 2026, 7:09 AM ET
Resolver
0x65070BE91...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.
Resolver
0x65070BE91...Official forecasts from the National Weather Service and Weather Prediction Center highlight a warm front and associated moisture surge with precipitable water values reaching 2–2.25 inches as the main driver of elevated rain probabilities across the Northeast and Midwest on September 13, 2026. Model consensus points to efficient warm-rain processes and potential excessive rainfall in corridors from the NYC metro northward and into the Missouri River Valley, though exact placement and totals retain uncertainty typical of mesoscale convective systems. Historical analogs for mid-September frontal passages and current ensemble spreads inform trader assessments of localized versus widespread precipitation. Updated Day 2 excessive rainfall outlooks and morning model runs represent key near-term data releases that could shift implied probabilities ahead of market resolution.
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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