Traders' tight race between 40-41°F (20.5%) and 42-43°F (20.0%) as Chicago's highest temperature on March 27 reflects the National Weather Service's latest forecast high of 41°F, driven by a mild southerly flow ahead of an approaching frontal boundary. Ensemble models from GFS and ECMWF show a narrow spread around 40-43°F, with subtle differences arising from boundary layer mixing efficiency and variable cloud cover limiting solar insolation during peak heating hours. Recent developments include a stabilizing jet stream ridge over the Midwest moderating earlier cold Canadian air masses, though dew point depressions of 15-20°F cap convective potential. Historical late-March averages near 45°F provide context, but current synoptic patterns favor below-normal peaks amid 60% probability of scattered showers.
Resumo experimental gerado por IA com dados do Polymarket · AtualizadoHighest temperature in Chicago on March 27?
Highest temperature in Chicago on March 27?
42-43°F 20%
40-41°F 19%
38-39°F 16%
44-45°F 13.7%
33°F or below
3%
34-35°F
6%
36-37°F
7%
38-39°F
16%
40-41°F
19%
42-43°F
20%
44-45°F
14%
46-47°F
10%
48-49°F
5%
50-51°F
3%
52°F or higher
5%
42-43°F 20%
40-41°F 19%
38-39°F 16%
44-45°F 13.7%
33°F or below
3%
34-35°F
6%
36-37°F
7%
38-39°F
16%
40-41°F
19%
42-43°F
20%
44-45°F
14%
46-47°F
10%
48-49°F
5%
50-51°F
3%
52°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 23, 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...Traders' tight race between 40-41°F (20.5%) and 42-43°F (20.0%) as Chicago's highest temperature on March 27 reflects the National Weather Service's latest forecast high of 41°F, driven by a mild southerly flow ahead of an approaching frontal boundary. Ensemble models from GFS and ECMWF show a narrow spread around 40-43°F, with subtle differences arising from boundary layer mixing efficiency and variable cloud cover limiting solar insolation during peak heating hours. Recent developments include a stabilizing jet stream ridge over the Midwest moderating earlier cold Canadian air masses, though dew point depressions of 15-20°F cap convective potential. Historical late-March averages near 45°F provide context, but current synoptic patterns favor below-normal peaks amid 60% probability of scattered showers.
Resumo experimental gerado por IA com dados do Polymarket · Atualizado
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