Official observations from Chicago-area stations, including Midway International Airport, recorded a daily maximum of 86–87°F on August 7, locking in that outcome at full market-implied probability. Forecasts from the National Weather Service and AccuWeather had converged on mid-80s readings under partly sunny skies with southerly flow and dew points supporting heat indices near 95°F, consistent with the slightly above-normal pattern after several cooler days earlier in the week. Lake Michigan moderation and typical August climatology (average high near 83.5°F) kept values from exceeding the observed range, while model consensus left little room for lower or higher bins once the day’s data arrived. Any challenge would require a post-analysis revision to the official high, an uncommon occurrence given standard verification protocols.
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 7?
Highest temperature in Chicago on August 7?
86-87°F 100.0%
75°F or below <1%
76-77°F <1%
78-79°F <1%
$31,912 Vol.
$31,912 Vol.
Aug 7, 2026
75°F or below
<1%
76-77°F
<1%
78-79°F
<1%
80-81°F
<1%
82-83°F
<1%
84-85°F
<1%
86-87°F
100%
88-89°F
<1%
90-91°F
<1%
92-93°F
<1%
94°F or higher
<1%
86-87°F 100.0%
75°F or below <1%
76-77°F <1%
78-79°F <1%
$31,912 Vol.
$31,912 Vol.
Aug 7, 2026
75°F or below
$1,820 Vol.
<1%
76-77°F
$1,124 Vol.
<1%
78-79°F
$755 Vol.
<1%
80-81°F
$1,984 Vol.
<1%
82-83°F
$4,057 Vol.
<1%
84-85°F
$7,874 Vol.
<1%
86-87°F
$5,203 Vol.
100%
88-89°F
$3,231 Vol.
<1%
90-91°F
$3,404 Vol.
<1%
92-93°F
$1,010 Vol.
<1%
94°F or higher
$1,449 Vol.
<1%
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 7 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.Official observations from Chicago-area stations, including Midway International Airport, recorded a daily maximum of 86–87°F on August 7, locking in that outcome at full market-implied probability. Forecasts from the National Weather Service and AccuWeather had converged on mid-80s readings under partly sunny skies with southerly flow and dew points supporting heat indices near 95°F, consistent with the slightly above-normal pattern after several cooler days earlier in the week. Lake Michigan moderation and typical August climatology (average high near 83.5°F) kept values from exceeding the observed range, while model consensus left little room for lower or higher bins once the day’s data arrived. Any challenge would require a post-analysis revision to the official high, an uncommon occurrence given standard verification protocols.
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 7 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 7 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 5, 2026, 9:02 PM ET
Volume
$31,912End Date
Aug 7, 2026Market Opened
Aug 5, 2026, 9:02 PM ETResolution Source
https://www.wunderground.com/history/daily/us/il/chicago/KORDResolver
0x69c47De9D...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 7 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.Official observations from Chicago-area stations, including Midway International Airport, recorded a daily maximum of 86–87°F on August 7, locking in that outcome at full market-implied probability. Forecasts from the National Weather Service and AccuWeather had converged on mid-80s readings under partly sunny skies with southerly flow and dew points supporting heat indices near 95°F, consistent with the slightly above-normal pattern after several cooler days earlier in the week. Lake Michigan moderation and typical August climatology (average high near 83.5°F) kept values from exceeding the observed range, while model consensus left little room for lower or higher bins once the day’s data arrived. Any challenge would require a post-analysis revision to the official high, an uncommon occurrence given standard verification protocols.
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 7 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 7 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
$31,912End Date
Aug 7, 2026Market Opened
Aug 5, 2026, 9:02 PM ETResolution Source
https://www.wunderground.com/history/daily/us/il/chicago/KORDResolver
0x69c47De9D...Official observations from Chicago-area stations, including Midway International Airport, recorded a daily maximum of 86–87°F on August 7, locking in that outcome at full market-implied probability. Forecasts from the National Weather Service and AccuWeather had converged on mid-80s readings under partly sunny skies with southerly flow and dew points supporting heat indices near 95°F, consistent with the slightly above-normal pattern after several cooler days earlier in the week. Lake Michigan moderation and typical August climatology (average high near 83.5°F) kept values from exceeding the observed range, while model consensus left little room for lower or higher bins once the day’s data arrived. Any challenge would require a post-analysis revision to the official high, an uncommon occurrence given standard verification protocols.
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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