In August, Evanston typically sees daytime highs of 26.3°C and overnight lows around 18.1°C. Compared to the annual average high of 13.3°C, August runs +13.0°C.
August in Evanston averages a daytime high of 26.3°C and an overnight low of 18.1°C.
August runs +13.0°C compared to Evanston's annual average high of 13.3°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 26.3°C and cooler evenings around 18.1°C.