**National Weather Service forecasts project a daytime high near 68°F at Chicago O'Hare International Airport on April 28, 2026, under breezy southwesterly winds and partly cloudy skies, driving the market's 100% implied probability for 56°F or higher as the dominant outcome.** This positioning aligns with the latest model consensus from NOAA's Global Forecast System and European Centre for Medium-Range Weather Forecasts, showing above-normal temperatures continuing a recent warm spell with prior days reaching the low 80s, well exceeding the April 28 climatological normal of 64°F. Trader sentiment reflects strong confidence in persistent high-pressure ridging over the Midwest. Realistic challenges include an unexpected shift in the upper-level pattern introducing cooler air from the north, increased low-level clouds from Lake Michigan, or a stalled frontal boundary causing prolonged overcast conditions, though current ensemble guidance shows low likelihood before evening observations finalize the official high, typically reported from Chicago Midway Airport.**
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 April 28?
Highest temperature in Chicago on April 28?
56°F or higher 100.0%
37°F or below <1%
38-39°F <1%
40-41°F <1%
$34,060 Vol.
$34,060 Vol.
Apr 28, 2026
37°F or below
No
38-39°F
No
40-41°F
No
42-43°F
No
44-45°F
No
46-47°F
No
48-49°F
No
50-51°F
No
52-53°F
No
54-55°F
No
56°F or higher
Yes
56°F or higher 100.0%
37°F or below <1%
38-39°F <1%
40-41°F <1%
$34,060 Vol.
$34,060 Vol.
Apr 28, 2026
37°F or below
$765 Vol.
No
38-39°F
$871 Vol.
No
40-41°F
$1,073 Vol.
No
42-43°F
$752 Vol.
No
44-45°F
$869 Vol.
No
46-47°F
$826 Vol.
No
48-49°F
$883 Vol.
No
50-51°F
$9,121 Vol.
No
52-53°F
$2,173 Vol.
No
54-55°F
$9,181 Vol.
No
56°F or higher
$7,545 Vol.
Yes
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 28 Apr '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Chicago O'Hare Intl Airport Station once information is finalized, 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 to "Yes" until all data for this date has been finalized.
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.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.**National Weather Service forecasts project a daytime high near 68°F at Chicago O'Hare International Airport on April 28, 2026, under breezy southwesterly winds and partly cloudy skies, driving the market's 100% implied probability for 56°F or higher as the dominant outcome.** This positioning aligns with the latest model consensus from NOAA's Global Forecast System and European Centre for Medium-Range Weather Forecasts, showing above-normal temperatures continuing a recent warm spell with prior days reaching the low 80s, well exceeding the April 28 climatological normal of 64°F. Trader sentiment reflects strong confidence in persistent high-pressure ridging over the Midwest. Realistic challenges include an unexpected shift in the upper-level pattern introducing cooler air from the north, increased low-level clouds from Lake Michigan, or a stalled frontal boundary causing prolonged overcast conditions, though current ensemble guidance shows low likelihood before evening observations finalize the official high, typically reported from Chicago Midway Airport.**
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 28 Apr '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Chicago O'Hare Intl Airport Station once information is finalized, 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 to "Yes" until all data for this date has been finalized.
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.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Chicago O'Hare Intl Airport Station once information is finalized, 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 to "Yes" until all data for this date has been finalized.
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.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
Market Opened: Apr 26, 2026, 12:14 AM ET
Volume
$34,060End Date
Apr 28, 2026Market Opened
Apr 26, 2026, 12:14 AM ETResolution Source
https://www.wunderground.com/history/daily/us/il/chicago/KORDResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
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 28 Apr '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Chicago O'Hare Intl Airport Station once information is finalized, 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 to "Yes" until all data for this date has been finalized.
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.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.**National Weather Service forecasts project a daytime high near 68°F at Chicago O'Hare International Airport on April 28, 2026, under breezy southwesterly winds and partly cloudy skies, driving the market's 100% implied probability for 56°F or higher as the dominant outcome.** This positioning aligns with the latest model consensus from NOAA's Global Forecast System and European Centre for Medium-Range Weather Forecasts, showing above-normal temperatures continuing a recent warm spell with prior days reaching the low 80s, well exceeding the April 28 climatological normal of 64°F. Trader sentiment reflects strong confidence in persistent high-pressure ridging over the Midwest. Realistic challenges include an unexpected shift in the upper-level pattern introducing cooler air from the north, increased low-level clouds from Lake Michigan, or a stalled frontal boundary causing prolonged overcast conditions, though current ensemble guidance shows low likelihood before evening observations finalize the official high, typically reported from Chicago Midway Airport.**
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 28 Apr '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Chicago O'Hare Intl Airport Station once information is finalized, 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 to "Yes" until all data for this date has been finalized.
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.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Chicago O'Hare Intl Airport Station once information is finalized, 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 to "Yes" until all data for this date has been finalized.
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.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
Volume
$34,060End Date
Apr 28, 2026Market Opened
Apr 26, 2026, 12:14 AM ETResolution Source
https://www.wunderground.com/history/daily/us/il/chicago/KORDResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
**National Weather Service forecasts project a daytime high near 68°F at Chicago O'Hare International Airport on April 28, 2026, under breezy southwesterly winds and partly cloudy skies, driving the market's 100% implied probability for 56°F or higher as the dominant outcome.** This positioning aligns with the latest model consensus from NOAA's Global Forecast System and European Centre for Medium-Range Weather Forecasts, showing above-normal temperatures continuing a recent warm spell with prior days reaching the low 80s, well exceeding the April 28 climatological normal of 64°F. Trader sentiment reflects strong confidence in persistent high-pressure ridging over the Midwest. Realistic challenges include an unexpected shift in the upper-level pattern introducing cooler air from the north, increased low-level clouds from Lake Michigan, or a stalled frontal boundary causing prolonged overcast conditions, though current ensemble guidance shows low likelihood before evening observations finalize the official high, typically reported from Chicago Midway Airport.**
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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