TOTAL VOLUME:
$134.1b
24H VOL:
$141,541,542
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,440,096,988
406,065
Markets across
30,522
events
MATCHED EVENTS:
2,692
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Jul 21, 2:00 AM EST
Kalshi
This market tracks the lowest temperature recorded in Chicago on July 20, 2026. The outcome will be determined by the official National Weather Service Climatological Report (Daily) for Chicago-Midway Airport, which provides the authoritative minimum temperature measurement for that date.
Resolution is based on the minimum temperature recorded at Chicago-Midway on July 20, 2026, as reported in the National Weather Service's Climatological Report (Daily). The temperature is divided into six ranges: 59°F or below, 60-61°F, 62-63°F, 64-65°F, 66-67°F, and 68°F or above. Each range corresponds to a separate market outcome. The official data source is accessed through the NWS website at the Chicago office, selecting the Observed Weather tab and Chicago-Midway with Daily Climate Report. Traders should note that preliminary NWS data may contain rounding and conversion nuances, and the final official report takes precedence over other weather sources such as AccuWeather or Google Weather.