Will the highest temperature in Denver be 90°F or higher on August 31?

Kalshi — primary rule

If there is at least 4 or more consecutive days within August 31, 2026 through September 6, 2026 on which the daily average temperature at KDEN in Denver is strictly greater than 90 degrees Fahrenheit, then the market resolves to Yes.

Polymarket — resolution criteria

This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Buckley Space Force Base Station in degrees Fahrenheit on 31 Aug '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=kbkf 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. 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.