In May, Santa Rosa typically sees daytime highs of 22.3°C and overnight lows around 8.1°C. Compared to the annual average high of 20.4°C, May runs +1.9°C.
May in Santa Rosa averages a daytime high of 22.3°C and an overnight low of 8.1°C.
May runs +1.9°C compared to Santa Rosa's annual average high of 20.4°C, ranking #6 of 12 months by warmth.
Plan for daytime highs near 22.3°C and cooler evenings around 8.1°C.