This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Chicago O'Hare Intl Airport Station in degrees Fahrenheit on 2 Sep '26. The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=kord This market will resolve off of the Hourly Data provided using the "Show Hourly Data" button. If NOAA data for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the resolution source. In the event which there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket. To toggle between Fahrenheit and Celsius, click the "Switch to US Units w/ kts" button until the relevant table displays °F. This market can not resolve until the first data point for the following date has been published on the resolution source. 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. Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
Current forecasts from the National Weather Service and supporting models indicate a high near 92–95°F in Chicago on September 2, 2026, driven by southwest winds of 10–15 mph, mostly sunny to partly cloudy skies, and elevated dew points producing heat indices above 100°F. This positions the 94–95°F bin as the market leader at 68.5% implied probability, consistent with hourly guidance showing afternoon peaks around 94°F at O’Hare and consensus across regional observations. Minor model spread and potential for late-day cloud cover or isolated convection introduce limited upside risk to 96–97°F, reflected in its 6.5% odds, while cooler outcomes remain unlikely given the established warm advection pattern.