In October 2026, Chicago recorded an average temperature of 60.8°F, which was 6.8°F above the normal for the month. That level ties the city’s October as the sixth warmest in more than 150 years of recorded data, according to the National Weather Service.
The month also saw an average high of 70°F. Chicago’s weather observations span over a century and a half, allowing the service to place current temperatures within a long‑term historical context.