Ensemble weather model forecasts from NOAA's GFS and ECMWF drive trader consensus toward mild highs of 64-69°F in Chicago on March 26, with closely matched odds reflecting a spread in projected 500 mb heights and warm air advection from the south. The National Weather Service's latest point forecast pegs the high near 66°F under partly cloudy skies, boosted by a building upper-level ridge over the Midwest that's displacing colder air, well above the March 26 climatological average of 48°F. Differentiating factors include the precise timing of an incoming weak front—earlier arrival could introduce clouds and limit peaks to 64-65°F, while delay favors 68-69°F per high-resolution HRRR runs. Slim chances for 70°F+ hinge on ridge amplification, unlikely per ensembles.
Resumo experimental gerado por IA com dados do Polymarket · AtualizadoHighest temperature in Chicago on March 26?
Highest temperature in Chicago on March 26?
64-65°F 15%
68-69°F 15%
66-67°F 14%
72-73°F 11%
$46,856 Vol.
$46,856 Vol.
59°F or below
7%
60-61°F
7%
62-63°F
7%
64-65°F
15%
66-67°F
14%
68-69°F
15%
70-71°F
10%
72-73°F
11%
74-75°F
8%
76-77°F
6%
78°F or higher
5%
64-65°F 15%
68-69°F 15%
66-67°F 14%
72-73°F 11%
$46,856 Vol.
$46,856 Vol.
59°F or below
7%
60-61°F
7%
62-63°F
7%
64-65°F
15%
66-67°F
14%
68-69°F
15%
70-71°F
10%
72-73°F
11%
74-75°F
8%
76-77°F
6%
78°F or higher
5%
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.
Mercado Aberto: Mar 22, 2026, 6:02 AM ET
Resolution Source
https://www.wunderground.com/history/daily/us/il/chicago/KORDResolver
0x69c47De9D...Resolution Source
https://www.wunderground.com/history/daily/us/il/chicago/KORDResolver
0x69c47De9D...Ensemble weather model forecasts from NOAA's GFS and ECMWF drive trader consensus toward mild highs of 64-69°F in Chicago on March 26, with closely matched odds reflecting a spread in projected 500 mb heights and warm air advection from the south. The National Weather Service's latest point forecast pegs the high near 66°F under partly cloudy skies, boosted by a building upper-level ridge over the Midwest that's displacing colder air, well above the March 26 climatological average of 48°F. Differentiating factors include the precise timing of an incoming weak front—earlier arrival could introduce clouds and limit peaks to 64-65°F, while delay favors 68-69°F per high-resolution HRRR runs. Slim chances for 70°F+ hinge on ridge amplification, unlikely per ensembles.
Resumo experimental gerado por IA com dados do Polymarket · Atualizado
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