Current forecast consensus from models and agencies such as the National Weather Service points to a Seattle overnight low in the mid-50s Fahrenheit on September 9, driven by clear to partly cloudy skies, light northerly winds, and moderate radiative cooling under high pressure. This setup aligns closely with the September climatological average low near 54°F, with limited moisture or cloud cover to retain heat. Market-implied odds favor the 54–55°F and 56–57°F bins due to tight model agreement, though minor shifts in wind direction or residual cloud cover could nudge the minimum across bin thresholds by a degree or two. Updated model runs and official NWS briefings ahead of sunset will provide the next key data points for traders assessing remaining uncertainty.
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?
54-55°F 39%
56-57°F 34%
52-53°F 22%
58-59°F 11%
47°F or below
8%
48-49°F
9%
50-51°F
11%
52-53°F
22%
54-55°F
39%
56-57°F
34%
58-59°F
11%
60-61°F
10%
62-63°F
1%
64-65°F
8%
66°F or higher
10%
54-55°F 39%
56-57°F 34%
52-53°F 22%
58-59°F 11%
47°F or below
8%
48-49°F
9%
50-51°F
11%
52-53°F
22%
54-55°F
39%
56-57°F
34%
58-59°F
11%
60-61°F
10%
62-63°F
1%
64-65°F
8%
66°F or higher
10%
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...Current forecast consensus from models and agencies such as the National Weather Service points to a Seattle overnight low in the mid-50s Fahrenheit on September 9, driven by clear to partly cloudy skies, light northerly winds, and moderate radiative cooling under high pressure. This setup aligns closely with the September climatological average low near 54°F, with limited moisture or cloud cover to retain heat. Market-implied odds favor the 54–55°F and 56–57°F bins due to tight model agreement, though minor shifts in wind direction or residual cloud cover could nudge the minimum across bin thresholds by a degree or two. Updated model runs and official NWS briefings ahead of sunset will provide the next key data points for traders assessing remaining uncertainty.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
Beware of external links.
Beware of external links.
Frequently Asked Questions