Trader consensus on Polymarket overwhelmingly backs 54-55°F as Chicago's highest temperature on May 11, reflecting verified observations from the National Weather Service at O'Hare International Airport, where air temperature peaked at 54°F amid multiple hourly readings in that range. This positioning stems from a recent cool air mass advection over the weekend, ushering northerly winds (NNE at 17-18 mph) that capped daytime heating despite clear skies, with morning lows in the upper 40s and dew points near freezing limiting instability. Well below the climatological May normal of 69°F, the market-implied odds align with NOAA's authoritative METAR data. Realistic challenges would require a rare official data revision or unverified station anomaly, unlikely given consistent observations.
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 May 11?
54-55°F 100.0%
47°F or below <1%
48-49°F <1%
50-51°F <1%
$92,636 Vol.
$92,636 Vol.
47°F or below
No
48-49°F
No
50-51°F
No
52-53°F
No
54-55°F
Yes
56-57°F
No
58-59°F
No
60-61°F
No
62-63°F
No
64-65°F
No
66°F or higher
No
54-55°F 100.0%
47°F or below <1%
48-49°F <1%
50-51°F <1%
$92,636 Vol.
$92,636 Vol.
47°F or below
No
48-49°F
No
50-51°F
No
52-53°F
No
54-55°F
Yes
56-57°F
No
58-59°F
No
60-61°F
No
62-63°F
No
64-65°F
No
66°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: May 9, 2026, 4:59 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
Trader consensus on Polymarket overwhelmingly backs 54-55°F as Chicago's highest temperature on May 11, reflecting verified observations from the National Weather Service at O'Hare International Airport, where air temperature peaked at 54°F amid multiple hourly readings in that range. This positioning stems from a recent cool air mass advection over the weekend, ushering northerly winds (NNE at 17-18 mph) that capped daytime heating despite clear skies, with morning lows in the upper 40s and dew points near freezing limiting instability. Well below the climatological May normal of 69°F, the market-implied odds align with NOAA's authoritative METAR data. Realistic challenges would require a rare official data revision or unverified station anomaly, unlikely given consistent observations.
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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