Recent National Weather Service and NOAA model consensus points to an overnight low of 55–57°F for Seattle on September 12 under persistent overcast skies, light northerly winds, and marine air influence that limits radiational cooling. This aligns with current evening readings near 55–56°F and the seasonal average low of 53.7°F, while traders weigh the modest risk of a dip into the mid-50s if partial clearing develops or winds slacken further. Market-implied odds cluster tightly around these values because short-range guidance shows limited spread, with resolution depending on the official minimum at Sea-Tac Airport. Updated model runs and the next NWS forecast discussion will provide the final calibration before the overnight period.
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 12?
47°F or below 46%
66°F or higher 45%
50-51°F 39%
58-59°F 39%
47°F or below
46%
48-49°F
14%
50-51°F
39%
52-53°F
22%
54-55°F
30%
56-57°F
36%
58-59°F
39%
60-61°F
39%
62-63°F
15%
64-65°F
15%
66°F or higher
45%
47°F or below 46%
66°F or higher 45%
50-51°F 39%
58-59°F 39%
47°F or below
46%
48-49°F
14%
50-51°F
39%
52-53°F
22%
54-55°F
30%
56-57°F
36%
58-59°F
39%
60-61°F
39%
62-63°F
15%
64-65°F
15%
66°F or higher
45%
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 10, 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...Recent National Weather Service and NOAA model consensus points to an overnight low of 55–57°F for Seattle on September 12 under persistent overcast skies, light northerly winds, and marine air influence that limits radiational cooling. This aligns with current evening readings near 55–56°F and the seasonal average low of 53.7°F, while traders weigh the modest risk of a dip into the mid-50s if partial clearing develops or winds slacken further. Market-implied odds cluster tightly around these values because short-range guidance shows limited spread, with resolution depending on the official minimum at Sea-Tac Airport. Updated model runs and the next NWS forecast discussion will provide the final calibration before the overnight period.
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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