Official observations from Chicago's O'Hare International Airport, the National Weather Service's primary measurement site, recorded a high temperature of 66°F on March 26 amid mild spring conditions with partly cloudy skies, light southerly winds around 10 mph, and no significant weather disruptions. This aligns with NOAA climatological data showing mid-March averages near 50°F but recent warm anomalies pushing into the mid-60s, supported by upper-air patterns favoring southerly flow. Trader consensus at 100% implied probability reflects this confirmed reading, with skin-in-the-game bets aggregating real-time station data. Realistic challenges are minimal—only rare post-audit revisions from auxiliary sensors or data quality issues could shift it, pending final NWS daily summary.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in Chicago on March 26?
Highest temperature in Chicago on March 26?
66-67°F 100.0%
59°F or below <1%
60-61°F <1%
62-63°F <1%
$526,487 Vol.
$526,487 Vol.
59°F or below
No
60-61°F
No
62-63°F
No
64-65°F
No
66-67°F
Yes
68-69°F
No
70-71°F
No
72-73°F
No
74-75°F
No
76-77°F
No
78°F or higher
No
66-67°F 100.0%
59°F or below <1%
60-61°F <1%
62-63°F <1%
$526,487 Vol.
$526,487 Vol.
59°F or below
No
60-61°F
No
62-63°F
No
64-65°F
No
66-67°F
Yes
68-69°F
No
70-71°F
No
72-73°F
No
74-75°F
No
76-77°F
No
78°F or higher
No
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...Outcome proposed: No
No dispute
Final outcome: No
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.
Resolution Source
https://www.wunderground.com/history/daily/us/il/chicago/KORDResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Official observations from Chicago's O'Hare International Airport, the National Weather Service's primary measurement site, recorded a high temperature of 66°F on March 26 amid mild spring conditions with partly cloudy skies, light southerly winds around 10 mph, and no significant weather disruptions. This aligns with NOAA climatological data showing mid-March averages near 50°F but recent warm anomalies pushing into the mid-60s, supported by upper-air patterns favoring southerly flow. Trader consensus at 100% implied probability reflects this confirmed reading, with skin-in-the-game bets aggregating real-time station data. Realistic challenges are minimal—only rare post-audit revisions from auxiliary sensors or data quality issues could shift it, pending final NWS daily summary.
Experimental AI-generated summary referencing Polymarket data · Updated
Beware of external links.
Beware of external links.
Frequently Asked Questions