Trader consensus on Polymarket implies a highest temperature around 73-74°F in Chicago today, driven by National Weather Service guidance forecasting highs near 74°F under a warm mid-level ridge pattern, with southerly winds advecting mild air masses well above the April 15 climatological normal of 59°F. Recent 00Z GFS and ECMWF model runs project potential peaks of 78-82°F, but scattered showers and severe thunderstorms—currently active per NWS Chicago alerts, featuring damaging winds and hail—introduce cloud cover and precipitation risks that could cap peak heating. Current O'Hare observations already reaching 79°F amid overcast conditions highlight the uncertainty, with resolution hinging on afternoon convective evolution and official daily max reports.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Chicago on April 15?
Highest temperature in Chicago on April 15?
74°F or higher 45%
72-73°F 35%
70-71°F 16%
68-69°F 4.5%
$61,718 Vol.
$61,718 Vol.
55°F or below
<1%
56-57°F
<1%
58-59°F
<1%
60-61°F
<1%
62-63°F
<1%
64-65°F
<1%
66-67°F
1%
68-69°F
4%
70-71°F
16%
72-73°F
35%
74°F or higher
45%
74°F or higher 45%
72-73°F 35%
70-71°F 16%
68-69°F 4.5%
$61,718 Vol.
$61,718 Vol.
55°F or below
<1%
56-57°F
<1%
58-59°F
<1%
60-61°F
<1%
62-63°F
<1%
64-65°F
<1%
66-67°F
1%
68-69°F
4%
70-71°F
16%
72-73°F
35%
74°F or higher
45%
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 13, 2026, 12:26 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...Trader consensus on Polymarket implies a highest temperature around 73-74°F in Chicago today, driven by National Weather Service guidance forecasting highs near 74°F under a warm mid-level ridge pattern, with southerly winds advecting mild air masses well above the April 15 climatological normal of 59°F. Recent 00Z GFS and ECMWF model runs project potential peaks of 78-82°F, but scattered showers and severe thunderstorms—currently active per NWS Chicago alerts, featuring damaging winds and hail—introduce cloud cover and precipitation risks that could cap peak heating. Current O'Hare observations already reaching 79°F amid overcast conditions highlight the uncertainty, with resolution hinging on afternoon convective evolution and official daily max reports.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
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