Highest temperature in Chicago on September 8? - 89 to 90

Prediction market on polymarket_us. Will the highest temperature recorded at Chicago Midway Airport (KMDW) in Chicago for 2026-09-08 as reported by the National Weather Service's Climatological Report (Daily) be between 89F and 90F? Outcome verified from NWS Climatological Report.

Resolves: 9/9/2026.