In August, Duluth typically sees daytime highs of 23.9°C and overnight lows around 11.4°C. Compared to the annual average high of 9.3°C, August runs +14.6°C.
August in Duluth averages a daytime high of 23.9°C and an overnight low of 11.4°C.
August runs +14.6°C compared to Duluth's annual average high of 9.3°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 23.9°C and cooler evenings around 11.4°C.