Traders assign the highest probabilities to 84-85°F and 86-87°F highs in Chicago on June 11 because official forecasts from the National Weather Service and model consensus point to mid- to upper-80s readings amid a broader heat and humidity surge across the central U.S. Warm southwesterly flow is advecting elevated temperatures while dew points in the 70s limit daytime mixing and support heat indices near 95-100°F, though scattered convection could cap the peak. Historical June climatology shows average highs near 79°F, making the current setup an above-normal outlier driven by persistent ridging. New model runs and National Weather Service updates through the evening of June 10 will refine whether any cooling from overnight storms or lake influence shifts the likely range.
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 June 11?
84-85°F 27%
86-87°F 20%
88-89°F 14.6%
82-83°F 15%
75°F or below
1%
76-77°F
2%
78-79°F
2%
80-81°F
3%
82-83°F
15%
84-85°F
27%
86-87°F
20%
88-89°F
15%
90-91°F
4%
92-93°F
1%
94°F or higher
1%
84-85°F 27%
86-87°F 20%
88-89°F 14.6%
82-83°F 15%
75°F or below
1%
76-77°F
2%
78-79°F
2%
80-81°F
3%
82-83°F
15%
84-85°F
27%
86-87°F
20%
88-89°F
15%
90-91°F
4%
92-93°F
1%
94°F or higher
1%
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: Jun 9, 2026, 9:04 PM ET
Resolution Source
https://www.wunderground.com/history/daily/us/il/chicago/KORDResolver
0x69c47De9D...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.
Resolution Source
https://www.wunderground.com/history/daily/us/il/chicago/KORDResolver
0x69c47De9D...Traders assign the highest probabilities to 84-85°F and 86-87°F highs in Chicago on June 11 because official forecasts from the National Weather Service and model consensus point to mid- to upper-80s readings amid a broader heat and humidity surge across the central U.S. Warm southwesterly flow is advecting elevated temperatures while dew points in the 70s limit daytime mixing and support heat indices near 95-100°F, though scattered convection could cap the peak. Historical June climatology shows average highs near 79°F, making the current setup an above-normal outlier driven by persistent ridging. New model runs and National Weather Service updates through the evening of June 10 will refine whether any cooling from overnight storms or lake influence shifts the likely range.
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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