In August, Santa Rosa typically sees daytime highs of 27.6°C and overnight lows around 11.3°C. Compared to the annual average high of 20.4°C, August runs +7.2°C.
August in Santa Rosa averages a daytime high of 27.6°C and an overnight low of 11.3°C.
August runs +7.2°C compared to Santa Rosa's annual average high of 20.4°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 27.6°C and cooler evenings around 11.3°C.