Official measurements from Seattle-Tacoma International Airport recorded a daily high of 66–67°F on September 11, 2026, under persistent overcast skies and light southerly winds that limited daytime heating. This outcome aligned closely with National Weather Service forecasts and climatological norms for early September, when average highs reach about 72°F but marine-layer cloud cover often suppresses temperatures by several degrees. The near-certain market consensus reflects verified observational data from authoritative sources, leaving minimal room for revision. Only an undetected station error or post-hoc quality-control adjustment could realistically shift the result outside this narrow band.
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 11?
Highest temperature in Seattle on September 11?
66-67°F 99.8%
72-73°F <1%
57°F or below <1%
58-59°F <1%
$26,560 Vol.
$26,560 Vol.
Sep 11, 2026
57°F or below
<1%
58-59°F
<1%
60-61°F
<1%
62-63°F
<1%
64-65°F
<1%
66-67°F
100%
68-69°F
<1%
70-71°F
<1%
72-73°F
<1%
74-75°F
<1%
76°F or higher
<1%
66-67°F 99.8%
72-73°F <1%
57°F or below <1%
58-59°F <1%
$26,560 Vol.
$26,560 Vol.
Sep 11, 2026
57°F or below
$198 Vol.
<1%
58-59°F
$497 Vol.
<1%
60-61°F
$1,237 Vol.
<1%
62-63°F
$1,798 Vol.
<1%
64-65°F
$3,753 Vol.
<1%
66-67°F
$5,720 Vol.
100%
68-69°F
$8,194 Vol.
<1%
70-71°F
$2,643 Vol.
<1%
72-73°F
$1,347 Vol.
<1%
74-75°F
$814 Vol.
<1%
76°F or higher
$358 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 11 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.Official measurements from Seattle-Tacoma International Airport recorded a daily high of 66–67°F on September 11, 2026, under persistent overcast skies and light southerly winds that limited daytime heating. This outcome aligned closely with National Weather Service forecasts and climatological norms for early September, when average highs reach about 72°F but marine-layer cloud cover often suppresses temperatures by several degrees. The near-certain market consensus reflects verified observational data from authoritative sources, leaving minimal room for revision. Only an undetected station error or post-hoc quality-control adjustment could realistically shift the result outside this narrow band.
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 11 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 9, 2026, 7:55 AM ET
Volume
$26,560End Date
Sep 11, 2026Market Opened
Sep 9, 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 11 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.Official measurements from Seattle-Tacoma International Airport recorded a daily high of 66–67°F on September 11, 2026, under persistent overcast skies and light southerly winds that limited daytime heating. This outcome aligned closely with National Weather Service forecasts and climatological norms for early September, when average highs reach about 72°F but marine-layer cloud cover often suppresses temperatures by several degrees. The near-certain market consensus reflects verified observational data from authoritative sources, leaving minimal room for revision. Only an undetected station error or post-hoc quality-control adjustment could realistically shift the result outside this narrow band.
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 11 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
$26,560End Date
Sep 11, 2026Market Opened
Sep 9, 2026, 7:55 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=kseaResolver
0x69c47De9D...Official measurements from Seattle-Tacoma International Airport recorded a daily high of 66–67°F on September 11, 2026, under persistent overcast skies and light southerly winds that limited daytime heating. This outcome aligned closely with National Weather Service forecasts and climatological norms for early September, when average highs reach about 72°F but marine-layer cloud cover often suppresses temperatures by several degrees. The near-certain market consensus reflects verified observational data from authoritative sources, leaving minimal room for revision. Only an undetected station error or post-hoc quality-control adjustment could realistically shift the result outside this narrow band.
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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