Observed temperatures at Chicago O'Hare International Airport—the official National Weather Service recording station—have already surpassed 46°F, reaching 54°F in recent hours under mostly cloudy skies and light east winds, driving Polymarket traders to a unanimous 100% implied probability for 46°F or higher as the day's high. NOAA forecasts confirm a peak near 57°F this afternoon, matching the April 11 climatological normal of 57.2°F and supported by model consensus showing stable atmospheric conditions with no cold fronts imminent. Inherent forecast uncertainty remains minimal post-threshold breach, as automated surface observing system data from redundant sensors minimizes revision risk; only an extraordinary measurement error could challenge resolution upon daily summary release.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Chicago on April 11?
Highest temperature in Chicago on April 11?
46°F or higher 100.0%
27°F or below <1%
28-29°F <1%
30-31°F <1%
$133,280 Vol.
$133,280 Vol.
27°F or below
No
28-29°F
No
30-31°F
No
32-33°F
No
34-35°F
No
36-37°F
No
38-39°F
No
40-41°F
No
42-43°F
No
44-45°F
No
46°F or higher
Yes
46°F or higher 100.0%
27°F or below <1%
28-29°F <1%
30-31°F <1%
$133,280 Vol.
$133,280 Vol.
27°F or below
No
28-29°F
No
30-31°F
No
32-33°F
No
34-35°F
No
36-37°F
No
38-39°F
No
40-41°F
No
42-43°F
No
44-45°F
No
46°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: Apr 7, 2026, 12:11 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
Observed temperatures at Chicago O'Hare International Airport—the official National Weather Service recording station—have already surpassed 46°F, reaching 54°F in recent hours under mostly cloudy skies and light east winds, driving Polymarket traders to a unanimous 100% implied probability for 46°F or higher as the day's high. NOAA forecasts confirm a peak near 57°F this afternoon, matching the April 11 climatological normal of 57.2°F and supported by model consensus showing stable atmospheric conditions with no cold fronts imminent. Inherent forecast uncertainty remains minimal post-threshold breach, as automated surface observing system data from redundant sensors minimizes revision risk; only an extraordinary measurement error could challenge resolution upon daily summary release.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated


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