Recent National Weather Service and model consensus forecasts for Chicago on August 27 point to a daytime high of 78–82°F under sunny to partly cloudy skies, driven by northwest winds advecting cooler post-frontal air and Lake Michigan’s moderating influence that caps inland peaks near 80°F while keeping lakeside readings several degrees lower. This setup follows Wednesday’s showers and thunderstorms, shifting the region into a stable, drier air mass with limited moisture for further destabilization. Trader emphasis on the 80–81°F bin reflects alignment with ensemble guidance showing modest daytime heating under clear conditions without significant warm-air advection or subsidence to push values higher. Upcoming afternoon model updates and official NWS refinements will refine the exact maximum ahead of market resolution.
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 27?
Highest temperature in Chicago on August 27?
80-81°F 56%
82-83°F 20%
78-79°F 17%
84-85°F 4%
NEW
NEW
Aug 27, 2026
73°F or below
<1%
74-75°F
2%
76-77°F
3%
78-79°F
17%
80-81°F
56%
82-83°F
20%
84-85°F
4%
86-87°F
1%
88-89°F
2%
90-91°F
1%
92°F or higher
<1%
80-81°F 56%
82-83°F 20%
78-79°F 17%
84-85°F 4%
NEW
NEW
Aug 27, 2026
73°F or below
$283 Vol.
<1%
74-75°F
$138 Vol.
2%
76-77°F
$87 Vol.
3%
78-79°F
$255 Vol.
17%
80-81°F
$270 Vol.
56%
82-83°F
$179 Vol.
20%
84-85°F
$111 Vol.
4%
86-87°F
$0 Vol.
1%
88-89°F
$10 Vol.
2%
90-91°F
$0 Vol.
1%
92°F or higher
$253 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 27 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
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.Recent National Weather Service and model consensus forecasts for Chicago on August 27 point to a daytime high of 78–82°F under sunny to partly cloudy skies, driven by northwest winds advecting cooler post-frontal air and Lake Michigan’s moderating influence that caps inland peaks near 80°F while keeping lakeside readings several degrees lower. This setup follows Wednesday’s showers and thunderstorms, shifting the region into a stable, drier air mass with limited moisture for further destabilization. Trader emphasis on the 80–81°F bin reflects alignment with ensemble guidance showing modest daytime heating under clear conditions without significant warm-air advection or subsidence to push values higher. Upcoming afternoon model updates and official NWS refinements will refine the exact maximum ahead of market resolution.
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 27 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
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.
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
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 25, 2026, 8:56 PM ET
Volume
$1,586End Date
Aug 27, 2026Market Opened
Aug 25, 2026, 8:56 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 27 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
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.Recent National Weather Service and model consensus forecasts for Chicago on August 27 point to a daytime high of 78–82°F under sunny to partly cloudy skies, driven by northwest winds advecting cooler post-frontal air and Lake Michigan’s moderating influence that caps inland peaks near 80°F while keeping lakeside readings several degrees lower. This setup follows Wednesday’s showers and thunderstorms, shifting the region into a stable, drier air mass with limited moisture for further destabilization. Trader emphasis on the 80–81°F bin reflects alignment with ensemble guidance showing modest daytime heating under clear conditions without significant warm-air advection or subsidence to push values higher. Upcoming afternoon model updates and official NWS refinements will refine the exact maximum ahead of market resolution.
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 27 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
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.
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
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.
Volume
$1,586End Date
Aug 27, 2026Market Opened
Aug 25, 2026, 8:56 PM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=kordResolver
0x69c47De9D...Recent National Weather Service and model consensus forecasts for Chicago on August 27 point to a daytime high of 78–82°F under sunny to partly cloudy skies, driven by northwest winds advecting cooler post-frontal air and Lake Michigan’s moderating influence that caps inland peaks near 80°F while keeping lakeside readings several degrees lower. This setup follows Wednesday’s showers and thunderstorms, shifting the region into a stable, drier air mass with limited moisture for further destabilization. Trader emphasis on the 80–81°F bin reflects alignment with ensemble guidance showing modest daytime heating under clear conditions without significant warm-air advection or subsidence to push values higher. Upcoming afternoon model updates and official NWS refinements will refine the exact maximum ahead of market 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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