Trader consensus overwhelmingly favors a Chicago high of 68-69°F (94.3% implied probability) on March 22, anchored by the National Weather Service's point forecast of 69°F and converging GFS/ECMWF ensemble models showing upper-60s peaks under a persistent high-pressure ridge and southerly flow. This marks a 20°F anomaly above the mid-40s March climatology at O'Hare, fueled by recent mild air mass advection confirmed in radiosonde data. Supporting evidence includes steady model runs since March 20, with minimal spread in 2m temperature outputs. Realistic challenges include a delayed cold front or increased cloud cover reducing insolation, potentially shifting odds toward 64-67°F bins; record warmth above 80°F remains improbable absent an extreme jet streak.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in Chicago on March 22?
Highest temperature in Chicago on March 22?
68-69°F 94.5%
70-71°F 4.5%
72-73°F 1.6%
74-75°F <1%
$175,876 Vol.
$175,876 Vol.
63°F or below
<1%
64-65°F
<1%
66-67°F
<1%
68-69°F
95%
70-71°F
5%
72-73°F
2%
74-75°F
1%
76-77°F
<1%
78-79°F
<1%
80-81°F
<1%
82°F or higher
<1%
68-69°F 94.5%
70-71°F 4.5%
72-73°F 1.6%
74-75°F <1%
$175,876 Vol.
$175,876 Vol.
63°F or below
<1%
64-65°F
<1%
66-67°F
<1%
68-69°F
95%
70-71°F
5%
72-73°F
2%
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 overwhelmingly favors a Chicago high of 68-69°F (94.3% implied probability) on March 22, anchored by the National Weather Service's point forecast of 69°F and converging GFS/ECMWF ensemble models showing upper-60s peaks under a persistent high-pressure ridge and southerly flow. This marks a 20°F anomaly above the mid-40s March climatology at O'Hare, fueled by recent mild air mass advection confirmed in radiosonde data. Supporting evidence includes steady model runs since March 20, with minimal spread in 2m temperature outputs. Realistic challenges include a delayed cold front or increased cloud cover reducing insolation, potentially shifting odds toward 64-67°F bins; record warmth above 80°F remains improbable absent an extreme jet streak.
Experimental AI-generated summary referencing Polymarket data · Updated
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