Forecast models from sources including the National Weather Service indicate a low near 56°F for Seattle on September 11, driven by persistent marine-layer cloud cover, light southerly winds, and dew points in the low 50s that limit overnight radiative cooling. This setup favors the market's leading 54-55°F and 56-57°F bins, as historical September averages hover around 54°F but recent days have trended slightly warmer amid stable high pressure. Key variables differentiating outcomes include the precise timing of any partial clearing, which could allow brief radiational cooling toward the mid-50s, versus sustained overcast conditions holding the minimum higher. Official resolution relies on the Seattle-Tacoma International Airport reading, with minimal precipitation expected to have negligible impact.
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 11?
54-55°F 40%
56-57°F 39%
52-53°F 23%
58-59°F 15%
47°F or below
14%
48-49°F
12%
50-51°F
13%
52-53°F
23%
54-55°F
40%
56-57°F
39%
58-59°F
15%
60-61°F
12%
62-63°F
12%
64-65°F
12%
66°F or higher
13%
54-55°F 40%
56-57°F 39%
52-53°F 23%
58-59°F 15%
47°F or below
14%
48-49°F
12%
50-51°F
13%
52-53°F
23%
54-55°F
40%
56-57°F
39%
58-59°F
15%
60-61°F
12%
62-63°F
12%
64-65°F
12%
66°F or higher
13%
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 9, 2026, 7:29 AM ET
Resolution Source
https://www.weather.gov/wrh/timeseries?site=kseaResolver
0x69c47De9D...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.
Resolution Source
https://www.weather.gov/wrh/timeseries?site=kseaResolver
0x69c47De9D...Forecast models from sources including the National Weather Service indicate a low near 56°F for Seattle on September 11, driven by persistent marine-layer cloud cover, light southerly winds, and dew points in the low 50s that limit overnight radiative cooling. This setup favors the market's leading 54-55°F and 56-57°F bins, as historical September averages hover around 54°F but recent days have trended slightly warmer amid stable high pressure. Key variables differentiating outcomes include the precise timing of any partial clearing, which could allow brief radiational cooling toward the mid-50s, versus sustained overcast conditions holding the minimum higher. Official resolution relies on the Seattle-Tacoma International Airport reading, with minimal precipitation expected to have negligible impact.
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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