In May, San Francisco typically sees daytime highs of 25.9°C and overnight lows around 17.1°C. Compared to the annual average high of 25.2°C, May runs +0.7°C.
May in San Francisco averages a daytime high of 25.9°C and an overnight low of 17.1°C.
May runs +0.7°C compared to San Francisco's annual average high of 25.2°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 25.9°C and cooler evenings around 17.1°C.