Trader consensus on Polymarket tilts toward a high of 62-69°F in Chicago on March 26, driven by the latest ensemble forecasts from NOAA's GFS and ECMWF models, which converge on mid-60s peaks amid southerly winds advecting warm air from the Gulf of Mexico. The National Weather Service point forecast implies around 64°F, with slight divergences due to cloud cover uncertainty—partly sunny skies could cap highs at 62-63°F (24% odds), while clearer conditions boost to 66-67°F (18.5%). Historical March 26 averages hover near 48°F, making this above-normal warmth probable but sensitive to frontal timing; below 60°F odds (21.5% total) reflect low-confidence cooler outliers in model spreads.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in Chicago on March 26?
Highest temperature in Chicago on March 26?
62-63°F 28%
64-65°F 19%
66-67°F 19%
68-69°F 18%
59°F or below
11%
60-61°F
11%
62-63°F
25%
64-65°F
19%
66-67°F
19%
68-69°F
18%
70-71°F
10%
72-73°F
7%
74-75°F
6%
76-77°F
6%
78°F or higher
1%
62-63°F 28%
64-65°F 19%
66-67°F 19%
68-69°F 18%
59°F or below
11%
60-61°F
11%
62-63°F
25%
64-65°F
19%
66-67°F
19%
68-69°F
18%
70-71°F
10%
72-73°F
7%
74-75°F
6%
76-77°F
6%
78°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 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 22, 2026, 6:02 AM ET
Resolution Source
https://www.wunderground.com/history/daily/us/il/chicago/KORDResolver
0x69c47De9D...Resolution Source
https://www.wunderground.com/history/daily/us/il/chicago/KORDResolver
0x69c47De9D...Trader consensus on Polymarket tilts toward a high of 62-69°F in Chicago on March 26, driven by the latest ensemble forecasts from NOAA's GFS and ECMWF models, which converge on mid-60s peaks amid southerly winds advecting warm air from the Gulf of Mexico. The National Weather Service point forecast implies around 64°F, with slight divergences due to cloud cover uncertainty—partly sunny skies could cap highs at 62-63°F (24% odds), while clearer conditions boost to 66-67°F (18.5%). Historical March 26 averages hover near 48°F, making this above-normal warmth probable but sensitive to frontal timing; below 60°F odds (21.5% total) reflect low-confidence cooler outliers in model spreads.
Experimental AI-generated summary referencing Polymarket data · Updated
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