Latest National Weather Service guidance for Chicago's O'Hare International Airport on March 27 points to a high temperature clustering around 40-43°F, fueling tight trader odds between 40-41°F (19%) and 42-43°F (21%). Ensemble model averages from GFS and ECMWF show a mean peak of 41.5°F amid uncertainty from a lingering upper-level trough over the Midwest, which could suppress highs by 2-3°F if it deepens, versus slight ridging allowing 42-43°F. Recent 00Z runs indicate minimal spread (within 3°F), differentiating leaders from cooler 38-39°F via soil temperature recovery from prior cold snaps and weak southerly flow advection. Traders eye 12Z updates for resolution criteria tied to official hourly observations.
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 21%
40-41°F 19%
38-39°F 14%
44-45°F 11.2%
33°F or below
3%
34-35°F
4%
36-37°F
9%
38-39°F
14%
40-41°F
19%
42-43°F
21%
44-45°F
11%
46-47°F
11%
48-49°F
6%
50-51°F
4%
52°F or higher
2%
42-43°F 21%
40-41°F 19%
38-39°F 14%
44-45°F 11.2%
33°F or below
3%
34-35°F
4%
36-37°F
9%
38-39°F
14%
40-41°F
19%
42-43°F
21%
44-45°F
11%
46-47°F
11%
48-49°F
6%
50-51°F
4%
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...Latest National Weather Service guidance for Chicago's O'Hare International Airport on March 27 points to a high temperature clustering around 40-43°F, fueling tight trader odds between 40-41°F (19%) and 42-43°F (21%). Ensemble model averages from GFS and ECMWF show a mean peak of 41.5°F amid uncertainty from a lingering upper-level trough over the Midwest, which could suppress highs by 2-3°F if it deepens, versus slight ridging allowing 42-43°F. Recent 00Z runs indicate minimal spread (within 3°F), differentiating leaders from cooler 38-39°F via soil temperature recovery from prior cold snaps and weak southerly flow advection. Traders eye 12Z updates for resolution criteria tied to official hourly observations.
Resumo experimental gerado por IA com dados do Polymarket · Atualizado
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