In August, Santa Rosa typically sees daytime highs of 17.6°C and overnight lows around 2.4°C. Compared to the annual average high of 23.4°C, August runs -5.7°C.
August in Santa Rosa averages a daytime high of 17.6°C and an overnight low of 2.4°C.
August runs -5.7°C compared to Santa Rosa's annual average high of 23.4°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 17.6°C and cooler evenings around 2.4°C.