Recent official forecasts from the National Weather Service and supporting models indicate a high near 77–79°F for Chicago on August 27, with northwest winds and a moderating lake breeze from Lake Michigan limiting daytime heating near the shoreline while allowing slightly higher readings inland. Partly cloudy skies and a low chance of afternoon showers further suppress peak temperatures below the late-August climatological average of 81°F. These conditions, following a cooler frontal passage, underpin trader consensus favoring 80–81°F (60.5% implied probability) and 82–83°F (28.5%), reflecting modest uncertainty in exact maximum readings across official stations amid typical model spread and lake-effect variability.
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 61%
82-83°F 29%
78-79°F 7%
84-85°F 4%
NEW
NEW
Aug 27, 2026
73°F or below
<1%
74-75°F
1%
76-77°F
2%
78-79°F
7%
80-81°F
61%
82-83°F
29%
84-85°F
4%
86-87°F
<1%
88-89°F
<1%
90-91°F
<1%
92°F or higher
<1%
80-81°F 61%
82-83°F 29%
78-79°F 7%
84-85°F 4%
NEW
NEW
Aug 27, 2026
73°F or below
$283 Vol.
<1%
74-75°F
$1,824 Vol.
1%
76-77°F
$341 Vol.
2%
78-79°F
$691 Vol.
7%
80-81°F
$2,283 Vol.
61%
82-83°F
$1,073 Vol.
29%
84-85°F
$354 Vol.
4%
86-87°F
$262 Vol.
<1%
88-89°F
$477 Vol.
<1%
90-91°F
$110 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 official forecasts from the National Weather Service and supporting models indicate a high near 77–79°F for Chicago on August 27, with northwest winds and a moderating lake breeze from Lake Michigan limiting daytime heating near the shoreline while allowing slightly higher readings inland. Partly cloudy skies and a low chance of afternoon showers further suppress peak temperatures below the late-August climatological average of 81°F. These conditions, following a cooler frontal passage, underpin trader consensus favoring 80–81°F (60.5% implied probability) and 82–83°F (28.5%), reflecting modest uncertainty in exact maximum readings across official stations amid typical model spread and lake-effect variability.
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
$7,791End 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 official forecasts from the National Weather Service and supporting models indicate a high near 77–79°F for Chicago on August 27, with northwest winds and a moderating lake breeze from Lake Michigan limiting daytime heating near the shoreline while allowing slightly higher readings inland. Partly cloudy skies and a low chance of afternoon showers further suppress peak temperatures below the late-August climatological average of 81°F. These conditions, following a cooler frontal passage, underpin trader consensus favoring 80–81°F (60.5% implied probability) and 82–83°F (28.5%), reflecting modest uncertainty in exact maximum readings across official stations amid typical model spread and lake-effect variability.
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
$7,791End Date
Aug 27, 2026Market Opened
Aug 25, 2026, 8:56 PM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=kordResolver
0x69c47De9D...Recent official forecasts from the National Weather Service and supporting models indicate a high near 77–79°F for Chicago on August 27, with northwest winds and a moderating lake breeze from Lake Michigan limiting daytime heating near the shoreline while allowing slightly higher readings inland. Partly cloudy skies and a low chance of afternoon showers further suppress peak temperatures below the late-August climatological average of 81°F. These conditions, following a cooler frontal passage, underpin trader consensus favoring 80–81°F (60.5% implied probability) and 82–83°F (28.5%), reflecting modest uncertainty in exact maximum readings across official stations amid typical model spread and lake-effect variability.
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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