In August, San Francisco typically sees daytime highs of 23.6°C and overnight lows around 12.0°C. Compared to the annual average high of 19.2°C, August runs +4.4°C.
August in San Francisco averages a daytime high of 23.6°C and an overnight low of 12.0°C.
August runs +4.4°C compared to San Francisco's annual average high of 19.2°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 23.6°C and cooler evenings around 12.0°C.