The market's 100% consensus on an 80–81°F high for Chicago on August 11 reflects National Weather Service observations at primary stations like O'Hare, where a powerful derecho and widespread thunderstorms delivered cloud cover, heavy rain, and gusty winds that suppressed daytime heating. These convective systems, fueled by atmospheric instability, prevented temperatures from reaching the pre-event forecast range near 83°F, consistent with climatological norms for mid-August but lowered by the storm's timing and intensity. Official daily maximum readings aligned precisely with this bin. Only an unlikely post-event data revision, station-specific discrepancy, or altered resolution criteria could shift the outcome.
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 11?
Highest temperature in Chicago on August 11?
80-81°F 100.0%
73°F or below <1%
74-75°F <1%
76-77°F <1%
$60,167 Vol.
$60,167 Vol.
Aug 11, 2026
73°F or below
No
74-75°F
No
76-77°F
No
78-79°F
No
80-81°F
Yes
82-83°F
No
84-85°F
No
86-87°F
No
88-89°F
No
90-91°F
No
92°F or higher
No
80-81°F 100.0%
73°F or below <1%
74-75°F <1%
76-77°F <1%
$60,167 Vol.
$60,167 Vol.
Aug 11, 2026
73°F or below
$1,446 Vol.
No
74-75°F
$7,755 Vol.
No
76-77°F
$11,650 Vol.
No
78-79°F
$6,344 Vol.
No
80-81°F
$8,159 Vol.
Yes
82-83°F
$9,085 Vol.
No
84-85°F
$6,204 Vol.
No
86-87°F
$3,898 Vol.
No
88-89°F
$866 Vol.
No
90-91°F
$3,283 Vol.
No
92°F or higher
$1,477 Vol.
No
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
This market will resolve to the temperature range that contains the highest temperature recorded at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 11 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Chicago O'Hare Intl Airport Station, available here: https://www.wunderground.com/history/daily/us/il/chicago/KORD.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
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 market's 100% consensus on an 80–81°F high for Chicago on August 11 reflects National Weather Service observations at primary stations like O'Hare, where a powerful derecho and widespread thunderstorms delivered cloud cover, heavy rain, and gusty winds that suppressed daytime heating. These convective systems, fueled by atmospheric instability, prevented temperatures from reaching the pre-event forecast range near 83°F, consistent with climatological norms for mid-August but lowered by the storm's timing and intensity. Official daily maximum readings aligned precisely with this bin. Only an unlikely post-event data revision, station-specific discrepancy, or altered resolution criteria could shift the outcome.
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
This market will resolve to the temperature range that contains the highest temperature recorded at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 11 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Chicago O'Hare Intl Airport Station, available here: https://www.wunderground.com/history/daily/us/il/chicago/KORD.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
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.
This market will resolve to the temperature range that contains the highest temperature recorded at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 11 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Chicago O'Hare Intl Airport Station, available here: https://www.wunderground.com/history/daily/us/il/chicago/KORD.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
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 9, 2026, 9:04 PM ET
Volume
$60,167End Date
Aug 11, 2026Market Opened
Aug 9, 2026, 9:04 PM ETResolution Source
https://www.wunderground.com/history/daily/us/il/chicago/KORDResolver
0x69c47De9D...Outcome proposed: Yes
No dispute
Final outcome: Yes
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
This market will resolve to the temperature range that contains the highest temperature recorded at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 11 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Chicago O'Hare Intl Airport Station, available here: https://www.wunderground.com/history/daily/us/il/chicago/KORD.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
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 market's 100% consensus on an 80–81°F high for Chicago on August 11 reflects National Weather Service observations at primary stations like O'Hare, where a powerful derecho and widespread thunderstorms delivered cloud cover, heavy rain, and gusty winds that suppressed daytime heating. These convective systems, fueled by atmospheric instability, prevented temperatures from reaching the pre-event forecast range near 83°F, consistent with climatological norms for mid-August but lowered by the storm's timing and intensity. Official daily maximum readings aligned precisely with this bin. Only an unlikely post-event data revision, station-specific discrepancy, or altered resolution criteria could shift the outcome.
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
This market will resolve to the temperature range that contains the highest temperature recorded at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 11 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Chicago O'Hare Intl Airport Station, available here: https://www.wunderground.com/history/daily/us/il/chicago/KORD.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
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.
This market will resolve to the temperature range that contains the highest temperature recorded at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 11 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Chicago O'Hare Intl Airport Station, available here: https://www.wunderground.com/history/daily/us/il/chicago/KORD.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
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
$60,167End Date
Aug 11, 2026Market Opened
Aug 9, 2026, 9:04 PM ETResolution Source
https://www.wunderground.com/history/daily/us/il/chicago/KORDResolver
0x69c47De9D...Outcome proposed: Yes
No dispute
Final outcome: Yes
The market's 100% consensus on an 80–81°F high for Chicago on August 11 reflects National Weather Service observations at primary stations like O'Hare, where a powerful derecho and widespread thunderstorms delivered cloud cover, heavy rain, and gusty winds that suppressed daytime heating. These convective systems, fueled by atmospheric instability, prevented temperatures from reaching the pre-event forecast range near 83°F, consistent with climatological norms for mid-August but lowered by the storm's timing and intensity. Official daily maximum readings aligned precisely with this bin. Only an unlikely post-event data revision, station-specific discrepancy, or altered resolution criteria could shift the outcome.
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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