National Weather Service forecasts for Chicago on March 27 indicate a high temperature likely in the low to mid-40s°F, aligning with trader consensus favoring 40-41°F and 42-43°F outcomes amid model uncertainty. Ensemble guidance from GFS and ECMWF shows a tight spread, with most runs clustering around 41-44°F under persistent cloud cover and light northerly winds capping daytime heating after overnight lows near freezing. Recent observational trends from O'Hare International Airport—Chicago's official recording station—confirm a stable cool air mass following a weak frontal passage on March 25, limiting solar insolation and boundary-layer mixing. Climatologically, late-March highs average 43°F, but current overcast conditions differentiate tighter ranges from warmer outliers. Updated hourly guidance expected midday March 27 could refine resolution near these thresholds.
Resumo experimental gerado por IA com dados do Polymarket · AtualizadoHighest temperature in Chicago on March 27?
Highest temperature in Chicago on March 27?
40-41°F 27%
42-43°F 23%
44-45°F 16.0%
38-39°F 12%
$34,145 Vol.
$34,145 Vol.
33°F or below
1%
34-35°F
3%
36-37°F
7%
38-39°F
12%
40-41°F
27%
42-43°F
23%
44-45°F
16%
46-47°F
9%
48-49°F
3%
50-51°F
2%
52°F or higher
2%
40-41°F 27%
42-43°F 23%
44-45°F 16.0%
38-39°F 12%
$34,145 Vol.
$34,145 Vol.
33°F or below
1%
34-35°F
3%
36-37°F
7%
38-39°F
12%
40-41°F
27%
42-43°F
23%
44-45°F
16%
46-47°F
9%
48-49°F
3%
50-51°F
2%
52°F or higher
2%
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...National Weather Service forecasts for Chicago on March 27 indicate a high temperature likely in the low to mid-40s°F, aligning with trader consensus favoring 40-41°F and 42-43°F outcomes amid model uncertainty. Ensemble guidance from GFS and ECMWF shows a tight spread, with most runs clustering around 41-44°F under persistent cloud cover and light northerly winds capping daytime heating after overnight lows near freezing. Recent observational trends from O'Hare International Airport—Chicago's official recording station—confirm a stable cool air mass following a weak frontal passage on March 25, limiting solar insolation and boundary-layer mixing. Climatologically, late-March highs average 43°F, but current overcast conditions differentiate tighter ranges from warmer outliers. Updated hourly guidance expected midday March 27 could refine resolution near these thresholds.
Resumo experimental gerado por IA com dados do Polymarket · Atualizado
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