In May, San Rafael typically sees daytime highs of 19.0°C and overnight lows around 4.3°C. Compared to the annual average high of 23.7°C, May runs -4.7°C.
May in San Rafael averages a daytime high of 19.0°C and an overnight low of 4.3°C.
May runs -4.7°C compared to San Rafael's annual average high of 23.7°C, ranking #9 of 12 months by warmth.
Plan for daytime highs near 19.0°C and cooler evenings around 4.3°C.