Latest National Weather Service forecasts for Chicago on March 22 project a high temperature of 60-63°F under partly cloudy skies, with light winds and no significant warm air advection, driving the 83.5% market-implied probability for 63°F or below as the clear frontrunner. Ensemble models from NOAA's GFS and ECMWF show tight clustering around this range, reflecting a persistent upper-level trough over the Midwest suppressing temperatures above seasonal norms of about 48°F. Recent developments include a stabilizing jet stream pattern confirmed in 00Z model runs, reducing upside risk for outliers like 70°F+, while trader consensus discounts minor warm anomalies seen in earlier outlooks. Key watch: afternoon temperature observations from O'Hare Airport, which resolve the market.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in Chicago on March 22?
Highest temperature in Chicago on March 22?
63°F or below 88%
72-73°F 3.1%
74-75°F 3.0%
80-81°F 3.0%
63°F or below
84%
64-65°F
7%
66-67°F
6%
68-69°F
6%
70-71°F
6%
72-73°F
3%
74-75°F
3%
76-77°F
3%
78-79°F
2%
80-81°F
3%
82°F or higher
2%
63°F or below 88%
72-73°F 3.1%
74-75°F 3.0%
80-81°F 3.0%
63°F or below
84%
64-65°F
7%
66-67°F
6%
68-69°F
6%
70-71°F
6%
72-73°F
3%
74-75°F
3%
76-77°F
3%
78-79°F
2%
80-81°F
3%
82°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 18, 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...Latest National Weather Service forecasts for Chicago on March 22 project a high temperature of 60-63°F under partly cloudy skies, with light winds and no significant warm air advection, driving the 83.5% market-implied probability for 63°F or below as the clear frontrunner. Ensemble models from NOAA's GFS and ECMWF show tight clustering around this range, reflecting a persistent upper-level trough over the Midwest suppressing temperatures above seasonal norms of about 48°F. Recent developments include a stabilizing jet stream pattern confirmed in 00Z model runs, reducing upside risk for outliers like 70°F+, while trader consensus discounts minor warm anomalies seen in earlier outlooks. Key watch: afternoon temperature observations from O'Hare Airport, which resolve the market.
Experimental AI-generated summary referencing Polymarket data · Updated

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