In December, San Rafael typically sees daytime highs of 13.1°C and overnight lows around 6.2°C. Compared to the annual average high of 16.7°C, December runs -3.6°C.
December in San Rafael averages a daytime high of 13.1°C and an overnight low of 6.2°C.
December runs -3.6°C compared to San Rafael's annual average high of 16.7°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 13.1°C and cooler evenings around 6.2°C.