In August, Rockford typically sees daytime highs of 27.7°C and overnight lows around 15.2°C. Compared to the annual average high of 14.3°C, August runs +13.4°C.
August in Rockford averages a daytime high of 27.7°C and an overnight low of 15.2°C.
August runs +13.4°C compared to Rockford's annual average high of 14.3°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 27.7°C and cooler evenings around 15.2°C.