Recent National Weather Service and ensemble model guidance points to a minimum temperature in Seattle on August 28 near 55–57°F, driven by increasing marine layer influence, persistent cloud cover, and light northerly flow that limits radiational cooling overnight. Multiple forecasts show overnight lows in the mid-50s amid a chance of light showers after midnight, consistent with typical late-August climatology where average minima hover around 56°F. Trader emphasis on the 56–57°F bin reflects tight model agreement on this range, while the sizable probability assigned to 49°F or below captures downside risk if clearer skies develop and allow stronger cooling. Upcoming NWS forecast updates and any revisions to boundary-layer moisture will be key near-term catalysts.
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 August 28?
49°F or below 64%
60-61°F 46%
56-57°F 39%
58-59°F 31%
49°F or below
64%
50-51°F
25%
52-53°F
26%
54-55°F
26%
56-57°F
39%
58-59°F
31%
60-61°F
46%
62-63°F
26%
64-65°F
2%
66-67°F
15%
68°F or higher
12%
49°F or below 64%
60-61°F 46%
56-57°F 39%
58-59°F 31%
49°F or below
64%
50-51°F
25%
52-53°F
26%
54-55°F
26%
56-57°F
39%
58-59°F
31%
60-61°F
46%
62-63°F
26%
64-65°F
2%
66-67°F
15%
68°F or higher
12%
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 is unavailable or missing for the observation period, Weather Underground will be used as the secondary resolution source.
To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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: Aug 26, 2026, 9:29 PM 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 is unavailable or missing for the observation period, Weather Underground will be used as the secondary resolution source.
To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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 ensemble model guidance points to a minimum temperature in Seattle on August 28 near 55–57°F, driven by increasing marine layer influence, persistent cloud cover, and light northerly flow that limits radiational cooling overnight. Multiple forecasts show overnight lows in the mid-50s amid a chance of light showers after midnight, consistent with typical late-August climatology where average minima hover around 56°F. Trader emphasis on the 56–57°F bin reflects tight model agreement on this range, while the sizable probability assigned to 49°F or below captures downside risk if clearer skies develop and allow stronger cooling. Upcoming NWS forecast updates and any revisions to boundary-layer moisture will be key near-term catalysts.
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