Trader consensus on Polymarket reflects National Weather Service guidance and 12z GFS/ECMWF ensemble means forecasting a high near 62°F at Chicago O'Hare International Airport on March 29, driven by mild south-southwesterly flow advecting Gulf-sourced air masses under partly sunny skies with light winds around 10 mph. This marks a rebound from recent cool-downs—highs of 44-45°F on March 27 and 49°F on March 28—toward above-normal readings exceeding the late-March climatological average of 52°F amid neutral-to-weak La Niña conditions. Close probabilities across 58-65°F stem from uncertainty in boundary-layer mixing efficiency and low-level cloud persistence; fuller clearing could boost to 64-65°F via enhanced afternoon heating, while lingering stratus might cap at 60-61°F. Watch 00z model runs and NWS updates for potential shifts ahead of resolution.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in Chicago on March 29?
Highest temperature in Chicago on March 29?
62-63°F 25%
60-61°F 18%
64-65°F 18%
58-59°F 17%
$27,694 Vol.
$27,694 Vol.
53°F or below
1%
54-55°F
1%
56-57°F
5%
58-59°F
17%
60-61°F
18%
62-63°F
25%
64-65°F
18%
66-67°F
12%
68-69°F
4%
70-71°F
2%
72°F or higher
2%
62-63°F 25%
60-61°F 18%
64-65°F 18%
58-59°F 17%
$27,694 Vol.
$27,694 Vol.
53°F or below
1%
54-55°F
1%
56-57°F
5%
58-59°F
17%
60-61°F
18%
62-63°F
25%
64-65°F
18%
66-67°F
12%
68-69°F
4%
70-71°F
2%
72°F or higher
2%
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: Mar 25, 2026, 6:02 AM 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 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.
Resolution Source
https://www.wunderground.com/history/daily/us/il/chicago/KORDResolver
0x69c47De9D...Trader consensus on Polymarket reflects National Weather Service guidance and 12z GFS/ECMWF ensemble means forecasting a high near 62°F at Chicago O'Hare International Airport on March 29, driven by mild south-southwesterly flow advecting Gulf-sourced air masses under partly sunny skies with light winds around 10 mph. This marks a rebound from recent cool-downs—highs of 44-45°F on March 27 and 49°F on March 28—toward above-normal readings exceeding the late-March climatological average of 52°F amid neutral-to-weak La Niña conditions. Close probabilities across 58-65°F stem from uncertainty in boundary-layer mixing efficiency and low-level cloud persistence; fuller clearing could boost to 64-65°F via enhanced afternoon heating, while lingering stratus might cap at 60-61°F. Watch 00z model runs and NWS updates for potential shifts ahead of resolution.
Experimental AI-generated summary referencing Polymarket data · Updated
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