Current forecasts from the National Weather Service and regional models point to an overnight low in the low to mid-50s°F for Seattle on September 19, driven by a shift to onshore flow that advects cooler marine air from the Pacific. This follows several days of warmer offshore flow under upper-level ridging. Clear to partly cloudy skies overnight will permit moderate radiational cooling, but persistent marine influence and light winds limit further drops below the seasonal average of roughly 52°F. Model consensus clusters probabilities in the 50–55°F range, with minor variations arising from exact cloud timing and boundary-layer mixing; traders price these thresholds closely because small forecast adjustments near dawn can shift the daily minimum across the leading bins.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedLowest temperature in Seattle on September 19?
Lowest temperature in Seattle on September 19?
50-51°F 40%
52-53°F 32%
54-55°F 30%
56-57°F 19%
NEW
NEW
Sep 19, 2026
45°F or below
7%
46-47°F
11%
48-49°F
18%
50-51°F
40%
52-53°F
32%
54-55°F
30%
56-57°F
19%
58-59°F
11%
60-61°F
7%
62-63°F
5%
64°F or higher
5%
50-51°F 40%
52-53°F 32%
54-55°F 30%
56-57°F 19%
NEW
NEW
Sep 19, 2026
45°F or below
$0 Vol.
7%
46-47°F
$0 Vol.
11%
48-49°F
$0 Vol.
18%
50-51°F
$0 Vol.
40%
52-53°F
$0 Vol.
32%
54-55°F
$0 Vol.
30%
56-57°F
$0 Vol.
19%
58-59°F
$0 Vol.
11%
60-61°F
$0 Vol.
7%
62-63°F
$0 Vol.
5%
64°F or higher
$0 Vol.
5%
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Seattle-Tacoma International Airport Station in degrees Fahrenheit on 19 Sep '26.
The resolution source for this market will be information from NOAA, specifically the lowest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=ksea
This market will resolve off of the Hourly Data provided using the "Show Hourly Data" button.
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
The resolution source for this market measures temperatures to whole degrees Fahrenheit (eg, 21°F). Thus, this is the level of precision that will be used when resolving the market.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.Current forecasts from the National Weather Service and regional models point to an overnight low in the low to mid-50s°F for Seattle on September 19, driven by a shift to onshore flow that advects cooler marine air from the Pacific. This follows several days of warmer offshore flow under upper-level ridging. Clear to partly cloudy skies overnight will permit moderate radiational cooling, but persistent marine influence and light winds limit further drops below the seasonal average of roughly 52°F. Model consensus clusters probabilities in the 50–55°F range, with minor variations arising from exact cloud timing and boundary-layer mixing; traders price these thresholds closely because small forecast adjustments near dawn can shift the daily minimum across the leading bins.
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Seattle-Tacoma International Airport Station in degrees Fahrenheit on 19 Sep '26.
The resolution source for this market will be information from NOAA, specifically the lowest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=ksea
This market will resolve off of the Hourly Data provided using the "Show Hourly Data" button.
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
The resolution source for this market measures temperatures to whole degrees Fahrenheit (eg, 21°F). Thus, this is the level of precision that will be used when resolving the market.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
The resolution source for this market will be information from NOAA, specifically the lowest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=ksea
This market will resolve off of the Hourly Data provided using the "Show Hourly Data" button.
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
The resolution source for this market measures temperatures to whole degrees Fahrenheit (eg, 21°F). Thus, this is the level of precision that will be used when resolving the market.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
Market Opened: Sep 17, 2026, 7:29 AM ET
Volume
$0End Date
Sep 19, 2026Market Opened
Sep 17, 2026, 7:29 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=kseaResolver
0x69c47De9D...This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Seattle-Tacoma International Airport Station in degrees Fahrenheit on 19 Sep '26.
The resolution source for this market will be information from NOAA, specifically the lowest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=ksea
This market will resolve off of the Hourly Data provided using the "Show Hourly Data" button.
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
The resolution source for this market measures temperatures to whole degrees Fahrenheit (eg, 21°F). Thus, this is the level of precision that will be used when resolving the market.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.Current forecasts from the National Weather Service and regional models point to an overnight low in the low to mid-50s°F for Seattle on September 19, driven by a shift to onshore flow that advects cooler marine air from the Pacific. This follows several days of warmer offshore flow under upper-level ridging. Clear to partly cloudy skies overnight will permit moderate radiational cooling, but persistent marine influence and light winds limit further drops below the seasonal average of roughly 52°F. Model consensus clusters probabilities in the 50–55°F range, with minor variations arising from exact cloud timing and boundary-layer mixing; traders price these thresholds closely because small forecast adjustments near dawn can shift the daily minimum across the leading bins.
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Seattle-Tacoma International Airport Station in degrees Fahrenheit on 19 Sep '26.
The resolution source for this market will be information from NOAA, specifically the lowest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=ksea
This market will resolve off of the Hourly Data provided using the "Show Hourly Data" button.
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
The resolution source for this market measures temperatures to whole degrees Fahrenheit (eg, 21°F). Thus, this is the level of precision that will be used when resolving the market.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
The resolution source for this market will be information from NOAA, specifically the lowest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=ksea
This market will resolve off of the Hourly Data provided using the "Show Hourly Data" button.
If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
The resolution source for this market measures temperatures to whole degrees Fahrenheit (eg, 21°F). Thus, this is the level of precision that will be used when resolving the market.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
Volume
$0End Date
Sep 19, 2026Market Opened
Sep 17, 2026, 7:29 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=kseaResolver
0x69c47De9D...Current forecasts from the National Weather Service and regional models point to an overnight low in the low to mid-50s°F for Seattle on September 19, driven by a shift to onshore flow that advects cooler marine air from the Pacific. This follows several days of warmer offshore flow under upper-level ridging. Clear to partly cloudy skies overnight will permit moderate radiational cooling, but persistent marine influence and light winds limit further drops below the seasonal average of roughly 52°F. Model consensus clusters probabilities in the 50–55°F range, with minor variations arising from exact cloud timing and boundary-layer mixing; traders price these thresholds closely because small forecast adjustments near dawn can shift the daily minimum across the leading bins.
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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