Lowest temperature in Chicago on Sep 21, 2026?

Kalshi

All markets resolve based on the minimum temperature recorded at Chicago’s CLIMDW station on September 21, 2026, as reported by The Weather Company. Each market corresponds to a specific temperature range: 53°F or below, 54–55°F, 56–57°F, 58–59°F, 60–61°F, or above 61°F. The Weather Company’s data is the sole authority, though participants may reference other services for guidance. Preliminary data may vary due to rounding or conversion, so caution is advised. If the Exchange identifies a material error in the initial data before expiration, it may delay resolution until a corrected version is published or until the expiration date. If no data remains available by expiration, markets resolve to the last fair price determined by Kalshi. The “Final” status on The Weather Company’s platform is informational and does not guarantee error-free data.