Recent National Weather Service guidance points to overnight lows near 60–62°F in Chicago on August 23 under mostly clear skies and northwest flow at 5–10 mph, favoring the tightly bunched 58–61°F market outcomes. Radiational cooling after daytime highs in the mid-70s will be tempered by moderate humidity and Lake Michigan’s moderating influence, while ensemble models show limited spread around these values. Historical August normals near 64°F provide context for the slightly cooler pattern, with any increase in cloud cover or wind the key variables that could shift the minimum higher and narrow the gap between the leading bins.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedLowest temperature in Chicago on August 23?
Lowest temperature in Chicago on August 23?
60-61°F 36%
58-59°F 34%
62-63°F 21%
68-69°F 18%
NEW
NEW
Aug 23, 2026
51°F or below
2%
52-53°F
8%
54-55°F
12%
56-57°F
16%
58-59°F
34%
60-61°F
36%
62-63°F
21%
64-65°F
9%
66-67°F
8%
68-69°F
18%
70°F or higher
4%
60-61°F 36%
58-59°F 34%
62-63°F 21%
68-69°F 18%
NEW
NEW
Aug 23, 2026
51°F or below
$12 Vol.
2%
52-53°F
$6 Vol.
8%
54-55°F
$0 Vol.
12%
56-57°F
$0 Vol.
16%
58-59°F
$0 Vol.
34%
60-61°F
$0 Vol.
36%
62-63°F
$0 Vol.
21%
64-65°F
$0 Vol.
9%
66-67°F
$0 Vol.
8%
68-69°F
$20 Vol.
18%
70°F or higher
$45 Vol.
4%
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 23 Aug '26.
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=kord
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.Recent National Weather Service guidance points to overnight lows near 60–62°F in Chicago on August 23 under mostly clear skies and northwest flow at 5–10 mph, favoring the tightly bunched 58–61°F market outcomes. Radiational cooling after daytime highs in the mid-70s will be tempered by moderate humidity and Lake Michigan’s moderating influence, while ensemble models show limited spread around these values. Historical August normals near 64°F provide context for the slightly cooler pattern, with any increase in cloud cover or wind the key variables that could shift the minimum higher and narrow the gap between the leading bins.
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 23 Aug '26.
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=kord
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.
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=kord
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 22, 2026, 12:28 AM ET
Volume
$83End Date
Aug 23, 2026Market Opened
Aug 22, 2026, 12:28 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=kordResolver
0x69c47De9D...This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 23 Aug '26.
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=kord
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.Recent National Weather Service guidance points to overnight lows near 60–62°F in Chicago on August 23 under mostly clear skies and northwest flow at 5–10 mph, favoring the tightly bunched 58–61°F market outcomes. Radiational cooling after daytime highs in the mid-70s will be tempered by moderate humidity and Lake Michigan’s moderating influence, while ensemble models show limited spread around these values. Historical August normals near 64°F provide context for the slightly cooler pattern, with any increase in cloud cover or wind the key variables that could shift the minimum higher and narrow the gap between the leading bins.
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 23 Aug '26.
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=kord
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.
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=kord
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.
Volume
$83End Date
Aug 23, 2026Market Opened
Aug 22, 2026, 12:28 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=kordResolver
0x69c47De9D...Recent National Weather Service guidance points to overnight lows near 60–62°F in Chicago on August 23 under mostly clear skies and northwest flow at 5–10 mph, favoring the tightly bunched 58–61°F market outcomes. Radiational cooling after daytime highs in the mid-70s will be tempered by moderate humidity and Lake Michigan’s moderating influence, while ensemble models show limited spread around these values. Historical August normals near 64°F provide context for the slightly cooler pattern, with any increase in cloud cover or wind the key variables that could shift the minimum higher and narrow the gap between the leading bins.
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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