**Current National Weather Service and model consensus forecasts indicate a high near 74°F for Chicago on August 23 under sunny to partly cloudy skies with northwest winds of 10-15 mph.** This below-normal reading (versus the ~82°F late-August average) stems from a post-frontal northwest flow advecting cooler, drier air following Saturday's activity, limiting afternoon heating and mixing. Leading market bins cluster tightly around 74-77°F because small differences in exact peak timing, cloud cover evolution, or local site variations (e.g., O'Hare versus downtown) can shift the daily maximum by 1-3°F. Updated model runs overnight and morning observations will refine whether the high settles in the lower or upper half of the mid-70s range.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Chicago on August 23?
Highest temperature in Chicago on August 23?
76-77°F 43%
74-75°F 41%
78-79°F 10%
72-73°F 9%
NEW
NEW
Aug 23, 2026
65°F or below
<1%
66-67°F
1%
68-69°F
1%
70-71°F
2%
72-73°F
9%
74-75°F
41%
76-77°F
43%
78-79°F
10%
80-81°F
2%
82-83°F
<1%
84°F or higher
<1%
76-77°F 43%
74-75°F 41%
78-79°F 10%
72-73°F 9%
NEW
NEW
Aug 23, 2026
65°F or below
$267 Vol.
<1%
66-67°F
$348 Vol.
1%
68-69°F
$380 Vol.
1%
70-71°F
$421 Vol.
2%
72-73°F
$629 Vol.
9%
74-75°F
$871 Vol.
41%
76-77°F
$955 Vol.
43%
78-79°F
$732 Vol.
10%
80-81°F
$380 Vol.
2%
82-83°F
$145 Vol.
<1%
84°F or higher
$218 Vol.
<1%
This market will resolve to the temperature range that contains the highest 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 highest 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.**Current National Weather Service and model consensus forecasts indicate a high near 74°F for Chicago on August 23 under sunny to partly cloudy skies with northwest winds of 10-15 mph.** This below-normal reading (versus the ~82°F late-August average) stems from a post-frontal northwest flow advecting cooler, drier air following Saturday's activity, limiting afternoon heating and mixing. Leading market bins cluster tightly around 74-77°F because small differences in exact peak timing, cloud cover evolution, or local site variations (e.g., O'Hare versus downtown) can shift the daily maximum by 1-3°F. Updated model runs overnight and morning observations will refine whether the high settles in the lower or upper half of the mid-70s range.
This market will resolve to the temperature range that contains the highest 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 highest 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 highest 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 21, 2026, 11:56 PM ET
Volume
$5,347End Date
Aug 23, 2026Market Opened
Aug 21, 2026, 11:56 PM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=kordResolver
0x69c47De9D...This market will resolve to the temperature range that contains the highest 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 highest 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.**Current National Weather Service and model consensus forecasts indicate a high near 74°F for Chicago on August 23 under sunny to partly cloudy skies with northwest winds of 10-15 mph.** This below-normal reading (versus the ~82°F late-August average) stems from a post-frontal northwest flow advecting cooler, drier air following Saturday's activity, limiting afternoon heating and mixing. Leading market bins cluster tightly around 74-77°F because small differences in exact peak timing, cloud cover evolution, or local site variations (e.g., O'Hare versus downtown) can shift the daily maximum by 1-3°F. Updated model runs overnight and morning observations will refine whether the high settles in the lower or upper half of the mid-70s range.
This market will resolve to the temperature range that contains the highest 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 highest 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 highest 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
$5,347End Date
Aug 23, 2026Market Opened
Aug 21, 2026, 11:56 PM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=kordResolver
0x69c47De9D...**Current National Weather Service and model consensus forecasts indicate a high near 74°F for Chicago on August 23 under sunny to partly cloudy skies with northwest winds of 10-15 mph.** This below-normal reading (versus the ~82°F late-August average) stems from a post-frontal northwest flow advecting cooler, drier air following Saturday's activity, limiting afternoon heating and mixing. Leading market bins cluster tightly around 74-77°F because small differences in exact peak timing, cloud cover evolution, or local site variations (e.g., O'Hare versus downtown) can shift the daily maximum by 1-3°F. Updated model runs overnight and morning observations will refine whether the high settles in the lower or upper half of the mid-70s range.
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