In August, San Francisco typically sees daytime highs of 20.0°C and overnight lows around 5.6°C. Compared to the annual average high of 24.7°C, August runs -4.7°C.
August in San Francisco averages a daytime high of 20.0°C and an overnight low of 5.6°C.
August runs -4.7°C compared to San Francisco's annual average high of 24.7°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 20.0°C and cooler evenings around 5.6°C.