Trader consensus on Polymarket heavily favors Chicago's highest temperature on March 22 staying at 63°F or below (57.5% implied probability), driven by the National Weather Service's latest forecast predicting a high near 62°F under mostly cloudy skies with light winds. Ensemble models from NOAA's GFS and ECMWF align, showing weak high-pressure ridging yielding daytime highs in the low 60s amid lingering cool air masses from recent frontal passages. Historical March averages hover around 45°F, but mild southerly flow has nudged recent days warmer; however, no significant warm advection is expected, positioning 64-65°F (22.1%) as the next likeliest outcome while extreme highs above 70°F carry negligible odds below 3% combined. Updated soundings this morning reinforce subdued instability, capping upside risks.
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 59%
64-65°F 22.6%
66-67°F 4.5%
68-69°F 2.5%
$54,531 Vol.
$54,531 Vol.
63°F or below
59%
64-65°F
23%
66-67°F
5%
68-69°F
3%
70-71°F
1%
72-73°F
1%
74-75°F
1%
76-77°F
1%
78-79°F
1%
80-81°F
1%
82°F or higher
1%
63°F or below 59%
64-65°F 22.6%
66-67°F 4.5%
68-69°F 2.5%
$54,531 Vol.
$54,531 Vol.
63°F or below
59%
64-65°F
23%
66-67°F
5%
68-69°F
3%
70-71°F
1%
72-73°F
1%
74-75°F
1%
76-77°F
1%
78-79°F
1%
80-81°F
1%
82°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 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...Trader consensus on Polymarket heavily favors Chicago's highest temperature on March 22 staying at 63°F or below (57.5% implied probability), driven by the National Weather Service's latest forecast predicting a high near 62°F under mostly cloudy skies with light winds. Ensemble models from NOAA's GFS and ECMWF align, showing weak high-pressure ridging yielding daytime highs in the low 60s amid lingering cool air masses from recent frontal passages. Historical March averages hover around 45°F, but mild southerly flow has nudged recent days warmer; however, no significant warm advection is expected, positioning 64-65°F (22.1%) as the next likeliest outcome while extreme highs above 70°F carry negligible odds below 3% combined. Updated soundings this morning reinforce subdued instability, capping upside risks.
Experimental AI-generated summary referencing Polymarket data · Updated
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