Official National Weather Service observations from Chicago O’Hare International Airport recorded a daily high temperature of 64–65°F on May 22, aligning with the market’s near-certain consensus for that outcome. Persistent northeast onshore flow from Lake Michigan suppressed warming beneath a cool air mass, keeping readings several degrees below the mid-May climatological average of roughly 73°F. Ensemble model guidance and surface analyses throughout the period consistently projected limited diurnal heating under mostly cloudy skies, with no late-day clearing or wind shift sufficient to reach 66°F. This observational confirmation from authoritative monitoring stations resolves the market while illustrating how lake-effect moderation and regional synoptic patterns can anchor temperatures within narrow daily ranges.
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 22?
Highest temperature in Chicago on May 22?
64-65°F 100.0%
47°F or below <1%
48-49°F <1%
50-51°F <1%
$72,608 Vol.
$72,608 Vol.
May 22, 2026
47°F or below
No
48-49°F
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
Yes
66°F or higher
No
64-65°F 100.0%
47°F or below <1%
48-49°F <1%
50-51°F <1%
$72,608 Vol.
$72,608 Vol.
May 22, 2026
47°F or below
$19,201 Vol.
No
48-49°F
$2,045 Vol.
No
50-51°F
$2,027 Vol.
No
52-53°F
$5,690 Vol.
No
54-55°F
$2,408 Vol.
No
56-57°F
$1,911 Vol.
No
58-59°F
$4,420 Vol.
No
60-61°F
$8,739 Vol.
No
62-63°F
$6,853 Vol.
No
64-65°F
$10,090 Vol.
Yes
66°F or higher
$9,225 Vol.
No
This market will resolve to the temperature range that contains the highest temperature recorded at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 22 May '26.
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.Official National Weather Service observations from Chicago O’Hare International Airport recorded a daily high temperature of 64–65°F on May 22, aligning with the market’s near-certain consensus for that outcome. Persistent northeast onshore flow from Lake Michigan suppressed warming beneath a cool air mass, keeping readings several degrees below the mid-May climatological average of roughly 73°F. Ensemble model guidance and surface analyses throughout the period consistently projected limited diurnal heating under mostly cloudy skies, with no late-day clearing or wind shift sufficient to reach 66°F. This observational confirmation from authoritative monitoring stations resolves the market while illustrating how lake-effect moderation and regional synoptic patterns can anchor temperatures within narrow daily ranges.
This market will resolve to the temperature range that contains the highest temperature recorded at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 22 May '26.
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.
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 20, 2026, 12:05 AM ET
Volume
$72,608End Date
May 22, 2026Market Opened
May 20, 2026, 12:05 AM ETResolution Source
https://www.wunderground.com/history/daily/us/il/chicago/KORDResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
This market will resolve to the temperature range that contains the highest temperature recorded at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 22 May '26.
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.Official National Weather Service observations from Chicago O’Hare International Airport recorded a daily high temperature of 64–65°F on May 22, aligning with the market’s near-certain consensus for that outcome. Persistent northeast onshore flow from Lake Michigan suppressed warming beneath a cool air mass, keeping readings several degrees below the mid-May climatological average of roughly 73°F. Ensemble model guidance and surface analyses throughout the period consistently projected limited diurnal heating under mostly cloudy skies, with no late-day clearing or wind shift sufficient to reach 66°F. This observational confirmation from authoritative monitoring stations resolves the market while illustrating how lake-effect moderation and regional synoptic patterns can anchor temperatures within narrow daily ranges.
This market will resolve to the temperature range that contains the highest temperature recorded at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 22 May '26.
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.
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.
Volume
$72,608End Date
May 22, 2026Market Opened
May 20, 2026, 12:05 AM ETResolution Source
https://www.wunderground.com/history/daily/us/il/chicago/KORDResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Official National Weather Service observations from Chicago O’Hare International Airport recorded a daily high temperature of 64–65°F on May 22, aligning with the market’s near-certain consensus for that outcome. Persistent northeast onshore flow from Lake Michigan suppressed warming beneath a cool air mass, keeping readings several degrees below the mid-May climatological average of roughly 73°F. Ensemble model guidance and surface analyses throughout the period consistently projected limited diurnal heating under mostly cloudy skies, with no late-day clearing or wind shift sufficient to reach 66°F. This observational confirmation from authoritative monitoring stations resolves the market while illustrating how lake-effect moderation and regional synoptic patterns can anchor temperatures within narrow daily ranges.
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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