**Mild marine air and persistent cloud cover are anchoring Seattle's overnight low near the mid-50s°F for September 12, aligning with climatological norms of ~53.7°F.** Official model guidance and short-range forecasts from multiple sources converge on a minimum of 54–57°F under overcast skies, light northerly or variable winds, and a modest chance of light rain or drizzle that limits radiational cooling. This setup favors the market's 54-55°F and 56-57°F bins, while the elevated 45% implied probability on 66°F or higher likely reflects residual uncertainty around forecast timing or localized microclimate effects rather than current consensus data. No major atmospheric shifts—such as strong high pressure or cold-air advection—are expected in the next 24–48 hours, keeping temperatures close to seasonal baselines and reducing the odds of extremes below 50°F or above 60°F. Updated National Weather Service model runs and evening observations will provide the next key data points for resolution.
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?
56-57°F 36%
54-55°F 35%
47°F or below 33%
66°F or higher 33%
47°F or below
33%
48-49°F
15%
50-51°F
26%
52-53°F
25%
54-55°F
35%
56-57°F
36%
58-59°F
30%
60-61°F
30%
62-63°F
6%
64-65°F
15%
66°F or higher
33%
56-57°F 36%
54-55°F 35%
47°F or below 33%
66°F or higher 33%
47°F or below
33%
48-49°F
15%
50-51°F
26%
52-53°F
25%
54-55°F
35%
56-57°F
36%
58-59°F
30%
60-61°F
30%
62-63°F
6%
64-65°F
15%
66°F or higher
33%
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...**Mild marine air and persistent cloud cover are anchoring Seattle's overnight low near the mid-50s°F for September 12, aligning with climatological norms of ~53.7°F.** Official model guidance and short-range forecasts from multiple sources converge on a minimum of 54–57°F under overcast skies, light northerly or variable winds, and a modest chance of light rain or drizzle that limits radiational cooling. This setup favors the market's 54-55°F and 56-57°F bins, while the elevated 45% implied probability on 66°F or higher likely reflects residual uncertainty around forecast timing or localized microclimate effects rather than current consensus data. No major atmospheric shifts—such as strong high pressure or cold-air advection—are expected in the next 24–48 hours, keeping temperatures close to seasonal baselines and reducing the odds of extremes below 50°F or above 60°F. Updated National Weather Service model runs and evening observations will provide the next key data points for resolution.
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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