National Weather Service observations at Chicago O'Hare International Airport, the official recording station, confirm the highest temperature on April 10, 2026, reached 54-55°F, driving the market-implied 100% probability for this outcome as traders align with verified hourly data. Persistent northerly winds at 10-14 mph, overcast skies with cloud bases around 1,000 feet, and lingering effects from a recent cold front suppressed daytime heating below the mid-April climatological normal of about 56°F. This followed a warmer April 9 high of 70°F amid typical spring variability. Scenarios challenging this near-certainty include rare preliminary data revisions from instrument recalibration, though NWS verification protocols make such shifts improbable; final daily climatological report expected soon will solidify resolution.
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 10?
Highest temperature in Chicago on April 10?
54-55°F 100.0%
37°F or below <1%
38-39°F <1%
40-41°F <1%
$365,123 Vol.
$365,123 Vol.
37°F or below
No
38-39°F
No
40-41°F
No
42-43°F
No
44-45°F
No
46-47°F
No
48-49°F
No
50-51°F
No
52-53°F
No
54-55°F
Yes
56°F or higher
No
54-55°F 100.0%
37°F or below <1%
38-39°F <1%
40-41°F <1%
$365,123 Vol.
$365,123 Vol.
37°F or below
No
38-39°F
No
40-41°F
No
42-43°F
No
44-45°F
No
46-47°F
No
48-49°F
No
50-51°F
No
52-53°F
No
54-55°F
Yes
56°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: Apr 6, 2026, 12:08 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
National Weather Service observations at Chicago O'Hare International Airport, the official recording station, confirm the highest temperature on April 10, 2026, reached 54-55°F, driving the market-implied 100% probability for this outcome as traders align with verified hourly data. Persistent northerly winds at 10-14 mph, overcast skies with cloud bases around 1,000 feet, and lingering effects from a recent cold front suppressed daytime heating below the mid-April climatological normal of about 56°F. This followed a warmer April 9 high of 70°F amid typical spring variability. Scenarios challenging this near-certainty include rare preliminary data revisions from instrument recalibration, though NWS verification protocols make such shifts improbable; final daily climatological report expected soon will solidify resolution.
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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