Trader consensus on Polymarket reflects National Weather Service forecasts and numerical model outputs clustering expected highs at Chicago O'Hare International Airport around 78-83°F for April 17, driven by a persistent upper-level ridge promoting southwesterly flow that advects warm, moist air from the southern Plains while surface high pressure limits cloud cover and precipitation risks. The GFS and ECMWF ensembles show tight agreement on upper-70s to low-80s peaks, well above the 60°F climatological normal, with minor spread arising from potential afternoon cumulus development or isolated showers capping peaks at 78-79°F versus fuller insolation pushing 80-83°F. Recent heavy rainfall on April 14-15 has cleared, enhancing dry adiabatic warming; watch for late-day NWS updates or HRRR model refreshes that could refine the peak hour between 2-5 PM CDT.
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 34%
78-79°F 22%
82-83°F 19%
84-85°F 11%
NEW
$24,579 Vol.
NEW
$24,579 Vol.
Apr 17, 2026
71°F or below
1%
72-73°F
1%
74-75°F
3%
76-77°F
7%
78-79°F
22%
80-81°F
34%
82-83°F
19%
84-85°F
11%
86-87°F
4%
88-89°F
<1%
90°F or higher
1%
80-81°F 34%
78-79°F 22%
82-83°F 19%
84-85°F 11%
NEW
$24,579 Vol.
NEW
$24,579 Vol.
Apr 17, 2026
71°F or below
$8,260 Vol.
1%
72-73°F
$2,068 Vol.
1%
74-75°F
$1,255 Vol.
3%
76-77°F
$2,217 Vol.
7%
78-79°F
$1,456 Vol.
22%
80-81°F
$1,593 Vol.
34%
82-83°F
$1,825 Vol.
19%
84-85°F
$1,242 Vol.
11%
86-87°F
$1,685 Vol.
4%
88-89°F
$1,459 Vol.
<1%
90°F or higher
$1,577 Vol.
1%
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.Trader consensus on Polymarket reflects National Weather Service forecasts and numerical model outputs clustering expected highs at Chicago O'Hare International Airport around 78-83°F for April 17, driven by a persistent upper-level ridge promoting southwesterly flow that advects warm, moist air from the southern Plains while surface high pressure limits cloud cover and precipitation risks. The GFS and ECMWF ensembles show tight agreement on upper-70s to low-80s peaks, well above the 60°F climatological normal, with minor spread arising from potential afternoon cumulus development or isolated showers capping peaks at 78-79°F versus fuller insolation pushing 80-83°F. Recent heavy rainfall on April 14-15 has cleared, enhancing dry adiabatic warming; watch for late-day NWS updates or HRRR model refreshes that could refine the peak hour between 2-5 PM CDT.
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
$24,579End Date
Apr 17, 2026Market Opened
Apr 15, 2026, 6:05 AM ETResolution Source
https://www.wunderground.com/history/daily/us/il/chicago/KORDResolver
0x69c47De9D...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.Trader consensus on Polymarket reflects National Weather Service forecasts and numerical model outputs clustering expected highs at Chicago O'Hare International Airport around 78-83°F for April 17, driven by a persistent upper-level ridge promoting southwesterly flow that advects warm, moist air from the southern Plains while surface high pressure limits cloud cover and precipitation risks. The GFS and ECMWF ensembles show tight agreement on upper-70s to low-80s peaks, well above the 60°F climatological normal, with minor spread arising from potential afternoon cumulus development or isolated showers capping peaks at 78-79°F versus fuller insolation pushing 80-83°F. Recent heavy rainfall on April 14-15 has cleared, enhancing dry adiabatic warming; watch for late-day NWS updates or HRRR model refreshes that could refine the peak hour between 2-5 PM CDT.
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
$24,579End Date
Apr 17, 2026Market Opened
Apr 15, 2026, 6:05 AM ETResolution Source
https://www.wunderground.com/history/daily/us/il/chicago/KORDResolver
0x69c47De9D...Trader consensus on Polymarket reflects National Weather Service forecasts and numerical model outputs clustering expected highs at Chicago O'Hare International Airport around 78-83°F for April 17, driven by a persistent upper-level ridge promoting southwesterly flow that advects warm, moist air from the southern Plains while surface high pressure limits cloud cover and precipitation risks. The GFS and ECMWF ensembles show tight agreement on upper-70s to low-80s peaks, well above the 60°F climatological normal, with minor spread arising from potential afternoon cumulus development or isolated showers capping peaks at 78-79°F versus fuller insolation pushing 80-83°F. Recent heavy rainfall on April 14-15 has cleared, enhancing dry adiabatic warming; watch for late-day NWS updates or HRRR model refreshes that could refine the peak hour between 2-5 PM CDT.
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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