Trader consensus on Polymarket prices a razor-thin contest between 62-63°F (26.5% implied probability) and 60-61°F (26.0%) for Chicago O'Hare's highest temperature on March 29, driven by National Weather Service guidance and GFS/ECMWF model ensembles forecasting highs in the low 60s amid a warming trend following chilly late-week conditions. This setup exceeds the late-March climatological average of 48°F under neutral-to-weak La Niña influences, with southerly winds promoting warm air advection and ample insolation. Differentiating factors include model spread on afternoon boundary layer mixing depths and high cloud cover, which could limit peak heating by 1-2°F; historical analogs show similar variability in transitional spring patterns. Final NWS updates and 12Z runs today precede resolution via official NOAA observations.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in Chicago on March 29?
Highest temperature in Chicago on March 29?
62-63°F 27%
60-61°F 25%
64-65°F 17%
58-59°F 15%
$17,872 Vol.
$17,872 Vol.
53°F or below
<1%
54-55°F
1%
56-57°F
5%
58-59°F
15%
60-61°F
25%
62-63°F
27%
64-65°F
17%
66-67°F
7%
68-69°F
2%
70-71°F
1%
72°F or higher
1%
62-63°F 27%
60-61°F 25%
64-65°F 17%
58-59°F 15%
$17,872 Vol.
$17,872 Vol.
53°F or below
<1%
54-55°F
1%
56-57°F
5%
58-59°F
15%
60-61°F
25%
62-63°F
27%
64-65°F
17%
66-67°F
7%
68-69°F
2%
70-71°F
1%
72°F or higher
1%
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: Mar 25, 2026, 6:02 AM ET
Resolution Source
https://www.wunderground.com/history/daily/us/il/chicago/KORDResolver
0x69c47De9D...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.
Resolution Source
https://www.wunderground.com/history/daily/us/il/chicago/KORDResolver
0x69c47De9D...Trader consensus on Polymarket prices a razor-thin contest between 62-63°F (26.5% implied probability) and 60-61°F (26.0%) for Chicago O'Hare's highest temperature on March 29, driven by National Weather Service guidance and GFS/ECMWF model ensembles forecasting highs in the low 60s amid a warming trend following chilly late-week conditions. This setup exceeds the late-March climatological average of 48°F under neutral-to-weak La Niña influences, with southerly winds promoting warm air advection and ample insolation. Differentiating factors include model spread on afternoon boundary layer mixing depths and high cloud cover, which could limit peak heating by 1-2°F; historical analogs show similar variability in transitional spring patterns. Final NWS updates and 12Z runs today precede resolution via official NOAA observations.
Experimental AI-generated summary referencing Polymarket data · Updated
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