Recent National Weather Service guidance and ensemble model runs point to partly cloudy conditions with onshore flow resuming Friday, limiting daytime heating and anchoring Seattle's September 19 high near the historical average of 69–70°F. Marine air moderated by Puget Sound and the thermal trough's inland push create the narrow spread across 66–71°F bins, as even modest increases in low-level stratus or wind shifts can trim or add a degree or two. Traders weigh the balance between lingering ridge influence and the return of typical fall onshore regimes, with resolution hinging on afternoon observations at Seattle-Tacoma International Airport.
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 19?
Highest temperature in Seattle on September 19?
70-71°F 26%
68-69°F 25%
66-67°F 20%
64-65°F 14%
NEW
NEW
Sep 19, 2026
63°F or below
1%
64-65°F
14%
66-67°F
20%
68-69°F
25%
70-71°F
26%
72-73°F
10%
74-75°F
11%
76-77°F
6%
78-79°F
4%
80-81°F
2%
82°F or higher
2%
70-71°F 26%
68-69°F 25%
66-67°F 20%
64-65°F 14%
NEW
NEW
Sep 19, 2026
63°F or below
$10 Vol.
1%
64-65°F
$259 Vol.
14%
66-67°F
$61 Vol.
20%
68-69°F
$9 Vol.
25%
70-71°F
$13 Vol.
26%
72-73°F
$11 Vol.
10%
74-75°F
$0 Vol.
11%
76-77°F
$7 Vol.
6%
78-79°F
$10 Vol.
4%
80-81°F
$10 Vol.
2%
82°F or higher
$10 Vol.
2%
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 19 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 guidance and ensemble model runs point to partly cloudy conditions with onshore flow resuming Friday, limiting daytime heating and anchoring Seattle's September 19 high near the historical average of 69–70°F. Marine air moderated by Puget Sound and the thermal trough's inland push create the narrow spread across 66–71°F bins, as even modest increases in low-level stratus or wind shifts can trim or add a degree or two. Traders weigh the balance between lingering ridge influence and the return of typical fall onshore regimes, with resolution hinging on afternoon observations at Seattle-Tacoma International Airport.
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 19 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 17, 2026, 7:55 AM ET
Volume
$401End Date
Sep 19, 2026Market Opened
Sep 17, 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 19 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 guidance and ensemble model runs point to partly cloudy conditions with onshore flow resuming Friday, limiting daytime heating and anchoring Seattle's September 19 high near the historical average of 69–70°F. Marine air moderated by Puget Sound and the thermal trough's inland push create the narrow spread across 66–71°F bins, as even modest increases in low-level stratus or wind shifts can trim or add a degree or two. Traders weigh the balance between lingering ridge influence and the return of typical fall onshore regimes, with resolution hinging on afternoon observations at Seattle-Tacoma International Airport.
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 19 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
$401End Date
Sep 19, 2026Market Opened
Sep 17, 2026, 7:55 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=kseaResolver
0x69c47De9D...Recent National Weather Service guidance and ensemble model runs point to partly cloudy conditions with onshore flow resuming Friday, limiting daytime heating and anchoring Seattle's September 19 high near the historical average of 69–70°F. Marine air moderated by Puget Sound and the thermal trough's inland push create the narrow spread across 66–71°F bins, as even modest increases in low-level stratus or wind shifts can trim or add a degree or two. Traders weigh the balance between lingering ridge influence and the return of typical fall onshore regimes, with resolution hinging on afternoon observations at Seattle-Tacoma International Airport.
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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