National Weather Service observations at Chicago O'Hare International Airport (KORD) confirm the highest temperature on April 17 reached 80-81°F around mid-afternoon, driving the market's unanimous trader consensus with 100% implied probability on this outcome. This peak, well above the climatological normal of 60°F, stemmed from southerly winds ushering in a warm, humid air mass ahead of a developing storm system, as evidenced by hourly ASOS data showing sustained readings near 80°F before thunderstorms and gusty winds arrived under a tornado watch. While final quality-controlled data rarely revises preliminary maxima, an improbable sensor recalibration or metadata review could challenge this positioning, though current reports 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 17?
Highest temperature in Chicago on April 17?
80-81°F 100.0%
71°F or below <1%
72-73°F <1%
74-75°F <1%
$140,476 Vol.
$140,476 Vol.
Apr 17, 2026
71°F or below
No
72-73°F
No
74-75°F
No
76-77°F
No
78-79°F
No
80-81°F
Yes
82-83°F
No
84-85°F
No
86-87°F
No
88-89°F
No
90°F or higher
No
80-81°F 100.0%
71°F or below <1%
72-73°F <1%
74-75°F <1%
$140,476 Vol.
$140,476 Vol.
Apr 17, 2026
71°F or below
$31,254 Vol.
No
72-73°F
$7,901 Vol.
No
74-75°F
$6,854 Vol.
No
76-77°F
$15,230 Vol.
No
78-79°F
$16,849 Vol.
No
80-81°F
$18,542 Vol.
Yes
82-83°F
$12,817 Vol.
No
84-85°F
$9,939 Vol.
No
86-87°F
$8,351 Vol.
No
88-89°F
$7,705 Vol.
No
90°F or higher
$5,035 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 17 Apr '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.National Weather Service observations at Chicago O'Hare International Airport (KORD) confirm the highest temperature on April 17 reached 80-81°F around mid-afternoon, driving the market's unanimous trader consensus with 100% implied probability on this outcome. This peak, well above the climatological normal of 60°F, stemmed from southerly winds ushering in a warm, humid air mass ahead of a developing storm system, as evidenced by hourly ASOS data showing sustained readings near 80°F before thunderstorms and gusty winds arrived under a tornado watch. While final quality-controlled data rarely revises preliminary maxima, an improbable sensor recalibration or metadata review could challenge this positioning, though current reports solidify resolution.
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 17 Apr '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: Apr 15, 2026, 6:05 AM ET
Volume
$140,476End Date
Apr 17, 2026Market Opened
Apr 15, 2026, 6:05 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 17 Apr '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.National Weather Service observations at Chicago O'Hare International Airport (KORD) confirm the highest temperature on April 17 reached 80-81°F around mid-afternoon, driving the market's unanimous trader consensus with 100% implied probability on this outcome. This peak, well above the climatological normal of 60°F, stemmed from southerly winds ushering in a warm, humid air mass ahead of a developing storm system, as evidenced by hourly ASOS data showing sustained readings near 80°F before thunderstorms and gusty winds arrived under a tornado watch. While final quality-controlled data rarely revises preliminary maxima, an improbable sensor recalibration or metadata review could challenge this positioning, though current reports solidify resolution.
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 17 Apr '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
$140,476End Date
Apr 17, 2026Market Opened
Apr 15, 2026, 6:05 AM ETResolution 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 (KORD) confirm the highest temperature on April 17 reached 80-81°F around mid-afternoon, driving the market's unanimous trader consensus with 100% implied probability on this outcome. This peak, well above the climatological normal of 60°F, stemmed from southerly winds ushering in a warm, humid air mass ahead of a developing storm system, as evidenced by hourly ASOS data showing sustained readings near 80°F before thunderstorms and gusty winds arrived under a tornado watch. While final quality-controlled data rarely revises preliminary maxima, an improbable sensor recalibration or metadata review could challenge this positioning, though current reports 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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