In August, Waukegan typically sees daytime highs of 26.6°C and overnight lows around 16.7°C. Compared to the annual average high of 13.5°C, August runs +13.1°C.
August in Waukegan averages a daytime high of 26.6°C and an overnight low of 16.7°C.
August runs +13.1°C compared to Waukegan's annual average high of 13.5°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 26.6°C and cooler evenings around 16.7°C.