Official National Weather Service observations at Chicago Midway International Airport recorded a daily maximum temperature exceeding 80°F on May 27, 2026, well above the long-term normal high of 74°F for the date. Preceding ensemble forecasts from NOAA consistently projected upper 70s to low 80s under southerly flow and mostly sunny conditions, aligning with above-average late-May warmth across the Midwest. This verified data from the primary resolution station underpins the market's 100% implied probability for 74°F or higher, reflecting trader consensus on the outcome with minimal realistic scenarios for revision given completed measurements.
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 27?
Highest temperature in Chicago on May 27?
74°F or higher 100.0%
55°F or below <1%
56-57°F <1%
58-59°F <1%
$19,268 Vol.
$19,268 Vol.
May 27, 2026
55°F or below
No
56-57°F
No
58-59°F
No
60-61°F
No
62-63°F
No
64-65°F
No
66-67°F
No
68-69°F
No
70-71°F
No
72-73°F
No
74°F or higher
Yes
74°F or higher 100.0%
55°F or below <1%
56-57°F <1%
58-59°F <1%
$19,268 Vol.
$19,268 Vol.
May 27, 2026
55°F or below
$1,082 Vol.
No
56-57°F
$563 Vol.
No
58-59°F
$568 Vol.
No
60-61°F
$568 Vol.
No
62-63°F
$568 Vol.
No
64-65°F
$563 Vol.
No
66-67°F
$552 Vol.
No
68-69°F
$588 Vol.
No
70-71°F
$1,129 Vol.
No
72-73°F
$5,129 Vol.
No
74°F or higher
$7,958 Vol.
Yes
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 27 May '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Chicago O'Hare Intl Airport Station, 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 until the first data point for the following date has been published on the resolution source.
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 at Chicago Midway International Airport recorded a daily maximum temperature exceeding 80°F on May 27, 2026, well above the long-term normal high of 74°F for the date. Preceding ensemble forecasts from NOAA consistently projected upper 70s to low 80s under southerly flow and mostly sunny conditions, aligning with above-average late-May warmth across the Midwest. This verified data from the primary resolution station underpins the market's 100% implied probability for 74°F or higher, reflecting trader consensus on the outcome with minimal realistic scenarios for revision given completed measurements.
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 27 May '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Chicago O'Hare Intl Airport Station, 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 until the first data point for the following date has been published on the resolution source.
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 for the Chicago O'Hare Intl Airport Station, 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 until the first data point for the following date has been published on the resolution source.
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 25, 2026, 12:56 AM ET
Volume
$19,268End Date
May 27, 2026Market Opened
May 25, 2026, 12:56 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 27 May '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Chicago O'Hare Intl Airport Station, 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 until the first data point for the following date has been published on the resolution source.
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 at Chicago Midway International Airport recorded a daily maximum temperature exceeding 80°F on May 27, 2026, well above the long-term normal high of 74°F for the date. Preceding ensemble forecasts from NOAA consistently projected upper 70s to low 80s under southerly flow and mostly sunny conditions, aligning with above-average late-May warmth across the Midwest. This verified data from the primary resolution station underpins the market's 100% implied probability for 74°F or higher, reflecting trader consensus on the outcome with minimal realistic scenarios for revision given completed measurements.
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 27 May '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Chicago O'Hare Intl Airport Station, 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 until the first data point for the following date has been published on the resolution source.
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 for the Chicago O'Hare Intl Airport Station, 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 until the first data point for the following date has been published on the resolution source.
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
$19,268End Date
May 27, 2026Market Opened
May 25, 2026, 12:56 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 at Chicago Midway International Airport recorded a daily maximum temperature exceeding 80°F on May 27, 2026, well above the long-term normal high of 74°F for the date. Preceding ensemble forecasts from NOAA consistently projected upper 70s to low 80s under southerly flow and mostly sunny conditions, aligning with above-average late-May warmth across the Midwest. This verified data from the primary resolution station underpins the market's 100% implied probability for 74°F or higher, reflecting trader consensus on the outcome with minimal realistic scenarios for revision given completed measurements.
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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