In May, San Rafael typically sees daytime highs of 17.3°C and overnight lows around 9.2°C. Compared to the annual average high of 16.7°C, May runs +0.6°C.
May in San Rafael averages a daytime high of 17.3°C and an overnight low of 9.2°C.
May runs +0.6°C compared to San Rafael's annual average high of 16.7°C, ranking #6 of 12 months by warmth.
Plan for daytime highs near 17.3°C and cooler evenings around 9.2°C.