Recent National Weather Service and model guidance indicate Seattle's overnight low on September 9 will likely settle in the mid-50s Fahrenheit, driven by clear to partly cloudy skies, light northerly winds, and the absence of incoming cold fronts or marine pushes. Observed lows from September 5–7 ranged 52–57°F amid similar stable high-pressure conditions, aligning with the 1991–2020 climatological average near 54°F for the date. Ensemble forecasts show minimal spread around this range, with limited potential for stronger radiational cooling or warmer downslope flow to shift outcomes outside 52–57°F. Traders have concentrated probability on the 54–55°F and adjacent bins, reflecting the tight consensus in current model runs ahead of final verification from official stations.
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 9?
56-57°F 50%
52-53°F 49%
54-55°F 31%
50-51°F 18%
47°F or below
14%
48-49°F
15%
50-51°F
18%
52-53°F
49%
54-55°F
31%
56-57°F
50%
58-59°F
16%
60-61°F
16%
62-63°F
15%
64-65°F
15%
66°F or higher
13%
56-57°F 50%
52-53°F 49%
54-55°F 31%
50-51°F 18%
47°F or below
14%
48-49°F
15%
50-51°F
18%
52-53°F
49%
54-55°F
31%
56-57°F
50%
58-59°F
16%
60-61°F
16%
62-63°F
15%
64-65°F
15%
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 7, 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 model guidance indicate Seattle's overnight low on September 9 will likely settle in the mid-50s Fahrenheit, driven by clear to partly cloudy skies, light northerly winds, and the absence of incoming cold fronts or marine pushes. Observed lows from September 5–7 ranged 52–57°F amid similar stable high-pressure conditions, aligning with the 1991–2020 climatological average near 54°F for the date. Ensemble forecasts show minimal spread around this range, with limited potential for stronger radiational cooling or warmer downslope flow to shift outcomes outside 52–57°F. Traders have concentrated probability on the 54–55°F and adjacent bins, reflecting the tight consensus in current model runs ahead of final verification from official stations.
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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