Recent National Weather Service and ensemble model guidance indicates mostly cloudy skies over Seattle on September 22, limiting daytime heating and supporting highs concentrated in the mid- to upper-60s °F. Persistent onshore flow and a weak marine layer typical of late-September Pacific Northwest conditions are expected to moderate temperatures near the seasonal average of 66 °F, with cloud cover reducing solar insolation as the key variable differentiating 66–67 °F from 68–69 °F outcomes. Minor model spread in timing of any afternoon clearing introduces uncertainty in peak readings, while historical climatology shows rare excursions above 70 °F this late in the month under similar synoptic setups. Updated NWS forecasts and hourly observations on the 22nd will provide the final data for market resolution.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Seattle on September 22?
Highest temperature in Seattle on September 22?
68-69°F 37%
66-67°F 36%
64-65°F 18%
70-71°F 12%
NEW
NEW
Sep 22, 2026
59°F or below
1%
60-61°F
1%
62-63°F
<1%
64-65°F
18%
66-67°F
36%
68-69°F
37%
70-71°F
12%
72-73°F
2%
74-75°F
<1%
76-77°F
<1%
78°F or higher
<1%
68-69°F 37%
66-67°F 36%
64-65°F 18%
70-71°F 12%
NEW
NEW
Sep 22, 2026
59°F or below
$16 Vol.
1%
60-61°F
$11 Vol.
1%
62-63°F
$180 Vol.
<1%
64-65°F
$1,356 Vol.
18%
66-67°F
$558 Vol.
36%
68-69°F
$1,243 Vol.
37%
70-71°F
$558 Vol.
12%
72-73°F
$207 Vol.
2%
74-75°F
$43 Vol.
<1%
76-77°F
$112 Vol.
<1%
78°F or higher
$130 Vol.
<1%
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Seattle-Tacoma International Airport Station in degrees Fahrenheit on 22 Sep '26.
The resolution source for this market will be information from NOAA, specifically the highest 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.Recent National Weather Service and ensemble model guidance indicates mostly cloudy skies over Seattle on September 22, limiting daytime heating and supporting highs concentrated in the mid- to upper-60s °F. Persistent onshore flow and a weak marine layer typical of late-September Pacific Northwest conditions are expected to moderate temperatures near the seasonal average of 66 °F, with cloud cover reducing solar insolation as the key variable differentiating 66–67 °F from 68–69 °F outcomes. Minor model spread in timing of any afternoon clearing introduces uncertainty in peak readings, while historical climatology shows rare excursions above 70 °F this late in the month under similar synoptic setups. Updated NWS forecasts and hourly observations on the 22nd will provide the final data for market resolution.
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Seattle-Tacoma International Airport Station in degrees Fahrenheit on 22 Sep '26.
The resolution source for this market will be information from NOAA, specifically the highest 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 highest 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 20, 2026, 7:55 AM ET
Volume
$4,414End Date
Sep 22, 2026Market Opened
Sep 20, 2026, 7:55 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=kseaResolver
0x69c47De9D...This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Seattle-Tacoma International Airport Station in degrees Fahrenheit on 22 Sep '26.
The resolution source for this market will be information from NOAA, specifically the highest 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.Recent National Weather Service and ensemble model guidance indicates mostly cloudy skies over Seattle on September 22, limiting daytime heating and supporting highs concentrated in the mid- to upper-60s °F. Persistent onshore flow and a weak marine layer typical of late-September Pacific Northwest conditions are expected to moderate temperatures near the seasonal average of 66 °F, with cloud cover reducing solar insolation as the key variable differentiating 66–67 °F from 68–69 °F outcomes. Minor model spread in timing of any afternoon clearing introduces uncertainty in peak readings, while historical climatology shows rare excursions above 70 °F this late in the month under similar synoptic setups. Updated NWS forecasts and hourly observations on the 22nd will provide the final data for market resolution.
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Seattle-Tacoma International Airport Station in degrees Fahrenheit on 22 Sep '26.
The resolution source for this market will be information from NOAA, specifically the highest 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 highest 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
$4,414End Date
Sep 22, 2026Market Opened
Sep 20, 2026, 7:55 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=kseaResolver
0x69c47De9D...Recent National Weather Service and ensemble model guidance indicates mostly cloudy skies over Seattle on September 22, limiting daytime heating and supporting highs concentrated in the mid- to upper-60s °F. Persistent onshore flow and a weak marine layer typical of late-September Pacific Northwest conditions are expected to moderate temperatures near the seasonal average of 66 °F, with cloud cover reducing solar insolation as the key variable differentiating 66–67 °F from 68–69 °F outcomes. Minor model spread in timing of any afternoon clearing introduces uncertainty in peak readings, while historical climatology shows rare excursions above 70 °F this late in the month under similar synoptic setups. Updated NWS forecasts and hourly observations on the 22nd will provide the final data for 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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