National Weather Service forecasts and major models including GFS and ECMWF ensembles converge on a Chicago O'Hare high temperature of 61-63°F on March 29, driving the narrow trader consensus with 62-63°F (26%) slightly edging 60-61°F (24.5%) amid southerly winds advecting mild air masses under a developing upper-level ridge. This setup follows a recent cooldown on March 27, exceeding the late-March climatological normal of 52°F during a neutral-to-weak La Niña pattern. Differentiating the closely matched bins are minor ensemble spreads of 1-3°F from uncertainties in afternoon peak heating timing, potential thin cirrus cloud cover limiting insolation, and variable low-level mixing under light winds; traders eye final 12z model runs and any afternoon soundings for resolution clues.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in Chicago on March 29?
Highest temperature in Chicago on March 29?
62-63°F 28%
60-61°F 28%
64-65°F 17%
58-59°F 14%
$17,733 Vol.
$17,733 Vol.
53°F or below
<1%
54-55°F
1%
56-57°F
5%
58-59°F
14%
60-61°F
28%
62-63°F
28%
64-65°F
17%
66-67°F
6%
68-69°F
2%
70-71°F
1%
72°F or higher
1%
62-63°F 28%
60-61°F 28%
64-65°F 17%
58-59°F 14%
$17,733 Vol.
$17,733 Vol.
53°F or below
<1%
54-55°F
1%
56-57°F
5%
58-59°F
14%
60-61°F
28%
62-63°F
28%
64-65°F
17%
66-67°F
6%
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...National Weather Service forecasts and major models including GFS and ECMWF ensembles converge on a Chicago O'Hare high temperature of 61-63°F on March 29, driving the narrow trader consensus with 62-63°F (26%) slightly edging 60-61°F (24.5%) amid southerly winds advecting mild air masses under a developing upper-level ridge. This setup follows a recent cooldown on March 27, exceeding the late-March climatological normal of 52°F during a neutral-to-weak La Niña pattern. Differentiating the closely matched bins are minor ensemble spreads of 1-3°F from uncertainties in afternoon peak heating timing, potential thin cirrus cloud cover limiting insolation, and variable low-level mixing under light winds; traders eye final 12z model runs and any afternoon soundings for resolution clues.
Experimental AI-generated summary referencing Polymarket data · Updated
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