Latest National Weather Service guidance for Chicago projects a high temperature well above 50°F on April 8, with GFS and ECMWF ensemble models converging on mid-50s°F amid southwesterly flow from an amplifying upper-level ridge, aligning with NOAA's warmer-than-normal spring outlook following a mild March. This consensus reflects clearing skies post-recent flooding rains and climatological norms of 56°F for the date, driving trader-implied odds to 98% for 50°F or higher as capital bets on historical model reliability for short-range temperature forecasts. Realistic challenges include an unexpected trough deepening for northerly winds or persistent low clouds capping highs in the upper 40s, though probabilities remain low; monitor twice-daily NWS updates and new 00Z/12Z model runs for shifts.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in Chicago on April 8?
Highest temperature in Chicago on April 8?
50°F or higher 97.0%
48-49°F 1.0%
42-43°F <1%
34-35°F <1%
$24,131 Vol.
$24,131 Vol.
31°F or below
<1%
32-33°F
<1%
34-35°F
<1%
36-37°F
<1%
38-39°F
<1%
40-41°F
<1%
42-43°F
<1%
44-45°F
<1%
46-47°F
<1%
48-49°F
1%
50°F or higher
97%
50°F or higher 97.0%
48-49°F 1.0%
42-43°F <1%
34-35°F <1%
$24,131 Vol.
$24,131 Vol.
31°F or below
<1%
32-33°F
<1%
34-35°F
<1%
36-37°F
<1%
38-39°F
<1%
40-41°F
<1%
42-43°F
<1%
44-45°F
<1%
46-47°F
<1%
48-49°F
1%
50°F or higher
97%
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: Apr 4, 2026, 12:11 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...Latest National Weather Service guidance for Chicago projects a high temperature well above 50°F on April 8, with GFS and ECMWF ensemble models converging on mid-50s°F amid southwesterly flow from an amplifying upper-level ridge, aligning with NOAA's warmer-than-normal spring outlook following a mild March. This consensus reflects clearing skies post-recent flooding rains and climatological norms of 56°F for the date, driving trader-implied odds to 98% for 50°F or higher as capital bets on historical model reliability for short-range temperature forecasts. Realistic challenges include an unexpected trough deepening for northerly winds or persistent low clouds capping highs in the upper 40s, though probabilities remain low; monitor twice-daily NWS updates and new 00Z/12Z model runs for shifts.
Experimental AI-generated summary referencing Polymarket data · Updated
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