National Weather Service Chicago's latest Area Forecast Discussion, issued early on May 13, identifies a cool airmass ushering northwesterly winds and highs near 57°F today at O'Hare, but projects a clear warmup on May 14 with temperatures trending upward into the low to mid-60s°F amid building high pressure and reduced cloud cover. This strong forecast model consensus—aligning GFS, ECMWF, and NAM ensembles—drives the 99.5% market-implied probability for 56°F or higher, well above the 0.5% odds for 54-55°F, reflecting trader confidence in diurnal heating from morning lows near 45-48°F. May climatology supports this, with historical O'Hare highs averaging 70°F. Realistic challenges include persistent marine layer clouds or an unanticipated shower cluster capping peaks in the mid-50s, though ensemble spreads indicate minimal risk; watch the afternoon NWS update for refinements ahead of tomorrow's observations.
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 May 14?
Highest temperature in Chicago on May 14?
56°F or higher 99.5%
54-55°F <1%
48-49°F <1%
50-51°F <1%
$47,025 Vol.
$47,025 Vol.
37°F or below
<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%
50-51°F
<1%
52-53°F
<1%
54-55°F
<1%
56°F or higher
100%
56°F or higher 99.5%
54-55°F <1%
48-49°F <1%
50-51°F <1%
$47,025 Vol.
$47,025 Vol.
37°F or below
<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%
50-51°F
<1%
52-53°F
<1%
54-55°F
<1%
56°F or higher
100%
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: May 12, 2026, 12:17 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...National Weather Service Chicago's latest Area Forecast Discussion, issued early on May 13, identifies a cool airmass ushering northwesterly winds and highs near 57°F today at O'Hare, but projects a clear warmup on May 14 with temperatures trending upward into the low to mid-60s°F amid building high pressure and reduced cloud cover. This strong forecast model consensus—aligning GFS, ECMWF, and NAM ensembles—drives the 99.5% market-implied probability for 56°F or higher, well above the 0.5% odds for 54-55°F, reflecting trader confidence in diurnal heating from morning lows near 45-48°F. May climatology supports this, with historical O'Hare highs averaging 70°F. Realistic challenges include persistent marine layer clouds or an unanticipated shower cluster capping peaks in the mid-50s, though ensemble spreads indicate minimal risk; watch the afternoon NWS update for refinements ahead of tomorrow's observations.
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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