National Weather Service observations at Chicago Midway International Airport recorded a daily maximum of 70–71°F on May 28, locking in near-certain market consensus for that outcome. NOAA ensemble guidance and local model runs had converged on upper-60s to low-70s highs days earlier, reflecting typical late-May climatology near the 74.7°F seasonal normal but tempered by persistent northeasterly flow and modest cloud cover that limited daytime heating. With the event now concluded, traders assign negligible probability to adjacent bins because any station-specific revision or micro-climate variance remains well within the 70–71°F range. Future resolution hinges solely on final official verification rather than evolving forecasts.
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 28?
Highest temperature in Chicago on May 28?
70-71°F 100.0%
65°F or below <1%
66-67°F <1%
68-69°F <1%
$82,093 Vol.
$82,093 Vol.
May 28, 2026
65°F or below
No
66-67°F
No
68-69°F
No
70-71°F
Yes
72-73°F
No
74-75°F
No
76-77°F
No
78-79°F
No
80-81°F
No
82-83°F
No
84°F or higher
No
70-71°F 100.0%
65°F or below <1%
66-67°F <1%
68-69°F <1%
$82,093 Vol.
$82,093 Vol.
May 28, 2026
65°F or below
$12,476 Vol.
No
66-67°F
$4,973 Vol.
No
68-69°F
$7,449 Vol.
No
70-71°F
$12,768 Vol.
Yes
72-73°F
$8,718 Vol.
No
74-75°F
$7,743 Vol.
No
76-77°F
$7,074 Vol.
No
78-79°F
$4,820 Vol.
No
80-81°F
$8,901 Vol.
No
82-83°F
$3,080 Vol.
No
84°F or higher
$4,091 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 28 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.National Weather Service observations at Chicago Midway International Airport recorded a daily maximum of 70–71°F on May 28, locking in near-certain market consensus for that outcome. NOAA ensemble guidance and local model runs had converged on upper-60s to low-70s highs days earlier, reflecting typical late-May climatology near the 74.7°F seasonal normal but tempered by persistent northeasterly flow and modest cloud cover that limited daytime heating. With the event now concluded, traders assign negligible probability to adjacent bins because any station-specific revision or micro-climate variance remains well within the 70–71°F range. Future resolution hinges solely on final official verification rather than evolving forecasts.
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 28 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 26, 2026, 12:09 AM ET
Volume
$82,093End Date
May 28, 2026Market Opened
May 26, 2026, 12:09 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 28 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.National Weather Service observations at Chicago Midway International Airport recorded a daily maximum of 70–71°F on May 28, locking in near-certain market consensus for that outcome. NOAA ensemble guidance and local model runs had converged on upper-60s to low-70s highs days earlier, reflecting typical late-May climatology near the 74.7°F seasonal normal but tempered by persistent northeasterly flow and modest cloud cover that limited daytime heating. With the event now concluded, traders assign negligible probability to adjacent bins because any station-specific revision or micro-climate variance remains well within the 70–71°F range. Future resolution hinges solely on final official verification rather than evolving forecasts.
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 28 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
$82,093End Date
May 28, 2026Market Opened
May 26, 2026, 12:09 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 Midway International Airport recorded a daily maximum of 70–71°F on May 28, locking in near-certain market consensus for that outcome. NOAA ensemble guidance and local model runs had converged on upper-60s to low-70s highs days earlier, reflecting typical late-May climatology near the 74.7°F seasonal normal but tempered by persistent northeasterly flow and modest cloud cover that limited daytime heating. With the event now concluded, traders assign negligible probability to adjacent bins because any station-specific revision or micro-climate variance remains well within the 70–71°F range. Future resolution hinges solely on final official verification rather than evolving forecasts.
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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