National Weather Service and regional forecasts for Chicago on August 28 indicate a high near 75–80°F under mostly sunny conditions, with lake-effect moderation keeping readings cooler near the shoreline while inland areas reach the low 80s. Model consensus supports this range, consistent with the historical average high of 81°F and recent stable high-pressure patterns limiting heat buildup. Trader positioning around the 82–83°F bin at 55% implied probability reflects expectations of modest upward forecast revisions or measurement at official stations, while lower bins capture downside risks from stronger lake breezes. Upcoming model runs and afternoon observations will provide key updates before 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 28?
Highest temperature in Chicago on August 28?
82-83°F 55%
84-85°F 20%
80-81°F 17%
86-87°F 6%
NEW
NEW
Aug 28, 2026
75°F or below
1%
76-77°F
2%
78-79°F
4%
80-81°F
17%
82-83°F
55%
84-85°F
20%
86-87°F
6%
88-89°F
<1%
90-91°F
<1%
92-93°F
<1%
94°F or higher
<1%
82-83°F 55%
84-85°F 20%
80-81°F 17%
86-87°F 6%
NEW
NEW
Aug 28, 2026
75°F or below
$80 Vol.
1%
76-77°F
$11 Vol.
2%
78-79°F
$61 Vol.
4%
80-81°F
$340 Vol.
17%
82-83°F
$490 Vol.
55%
84-85°F
$465 Vol.
20%
86-87°F
$191 Vol.
6%
88-89°F
$11 Vol.
<1%
90-91°F
$88 Vol.
<1%
92-93°F
$269 Vol.
<1%
94°F or higher
$269 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 28 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.National Weather Service and regional forecasts for Chicago on August 28 indicate a high near 75–80°F under mostly sunny conditions, with lake-effect moderation keeping readings cooler near the shoreline while inland areas reach the low 80s. Model consensus supports this range, consistent with the historical average high of 81°F and recent stable high-pressure patterns limiting heat buildup. Trader positioning around the 82–83°F bin at 55% implied probability reflects expectations of modest upward forecast revisions or measurement at official stations, while lower bins capture downside risks from stronger lake breezes. Upcoming model runs and afternoon observations will provide key updates before 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 28 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 26, 2026, 8:56 PM ET
Volume
$2,275End Date
Aug 28, 2026Market Opened
Aug 26, 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 28 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.National Weather Service and regional forecasts for Chicago on August 28 indicate a high near 75–80°F under mostly sunny conditions, with lake-effect moderation keeping readings cooler near the shoreline while inland areas reach the low 80s. Model consensus supports this range, consistent with the historical average high of 81°F and recent stable high-pressure patterns limiting heat buildup. Trader positioning around the 82–83°F bin at 55% implied probability reflects expectations of modest upward forecast revisions or measurement at official stations, while lower bins capture downside risks from stronger lake breezes. Upcoming model runs and afternoon observations will provide key updates before 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 28 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
$2,275End Date
Aug 28, 2026Market Opened
Aug 26, 2026, 8:56 PM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=kordResolver
0x69c47De9D...National Weather Service and regional forecasts for Chicago on August 28 indicate a high near 75–80°F under mostly sunny conditions, with lake-effect moderation keeping readings cooler near the shoreline while inland areas reach the low 80s. Model consensus supports this range, consistent with the historical average high of 81°F and recent stable high-pressure patterns limiting heat buildup. Trader positioning around the 82–83°F bin at 55% implied probability reflects expectations of modest upward forecast revisions or measurement at official stations, while lower bins capture downside risks from stronger lake breezes. Upcoming model runs and afternoon observations will provide key updates before 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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