In July, Chicago typically sees daytime highs of 27.7°C and overnight lows around 18.0°C. Compared to the annual average high of 14.1°C, July runs +13.6°C.
July in Chicago averages a daytime high of 27.7°C and an overnight low of 18.0°C.
July runs +13.6°C compared to Chicago's annual average high of 14.1°C, ranking #1 of 12 months by warmth.
Plan for daytime highs near 27.7°C and cooler evenings around 18.0°C.