In August, San Rafael typically sees daytime highs of 18.1°C and overnight lows around 1.8°C. Compared to the annual average high of 23.7°C, August runs -5.6°C.
August in San Rafael averages a daytime high of 18.1°C and an overnight low of 1.8°C.
August runs -5.6°C compared to San Rafael's annual average high of 23.7°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 18.1°C and cooler evenings around 1.8°C.