Highest temperature in Chicago on September 30? - 77 or above
Prediction market on polymarket_us. Will the highest temperature recorded at Chicago Midway Airport (KMDW) in Chicago for 2026-09-30 as reported by the National Weather Service's Climatological Report (Daily) be greater than or equal to 77F? Outcome verified from NWS Climatological Report.
Resolves: 10/1/2026.