National Weather Service forecasts show high confidence for Chicago's highest temperature on March 25 reaching 68°F or higher, driven by a potent ridge of high pressure ushering warm southerly winds and above-normal temperatures aloft, with ensemble model runs from GFS and ECMWF converging on afternoon highs of 70–75°F at O'Hare International Airport. This positioning aligns with recent upper-air soundings confirming anomalously mild conditions, far exceeding the late-March climatological average of 47°F, explaining the market's 100% implied probability on this outcome as trader consensus reflects robust scientific evidence. Realistic challenges include an unanticipated increase in cloud cover or early cold frontal intrusion, potentially capping highs at 66–67°F, though current guidance deems these low-probability scenarios; hourly observations will provide final resolution.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in Chicago on March 25?
Highest temperature in Chicago on March 25?
68°F or higher 100.0%
49°F or below <1%
50-51°F <1%
52-53°F <1%
$195,574 Vol.
$195,574 Vol.
49°F or below
No
50-51°F
No
52-53°F
No
54-55°F
No
56-57°F
No
58-59°F
No
60-61°F
No
62-63°F
No
64-65°F
No
66-67°F
No
68°F or higher
Yes
68°F or higher 100.0%
49°F or below <1%
50-51°F <1%
52-53°F <1%
$195,574 Vol.
$195,574 Vol.
49°F or below
No
50-51°F
No
52-53°F
No
54-55°F
No
56-57°F
No
58-59°F
No
60-61°F
No
62-63°F
No
64-65°F
No
66-67°F
No
68°F or higher
Yes
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 21, 2026, 6:02 AM ET
Resolution Source
https://www.wunderground.com/history/daily/us/il/chicago/KORDResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Resolution Source
https://www.wunderground.com/history/daily/us/il/chicago/KORDResolver
0x69c47De9D...National Weather Service forecasts show high confidence for Chicago's highest temperature on March 25 reaching 68°F or higher, driven by a potent ridge of high pressure ushering warm southerly winds and above-normal temperatures aloft, with ensemble model runs from GFS and ECMWF converging on afternoon highs of 70–75°F at O'Hare International Airport. This positioning aligns with recent upper-air soundings confirming anomalously mild conditions, far exceeding the late-March climatological average of 47°F, explaining the market's 100% implied probability on this outcome as trader consensus reflects robust scientific evidence. Realistic challenges include an unanticipated increase in cloud cover or early cold frontal intrusion, potentially capping highs at 66–67°F, though current guidance deems these low-probability scenarios; hourly observations will provide final resolution.
Experimental AI-generated summary referencing Polymarket data · Updated
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