In May, Galveston typically sees daytime highs of 27.1°C and overnight lows around 21.2°C. Compared to the annual average high of 24.1°C, May runs +3.0°C.
May in Galveston averages a daytime high of 27.1°C and an overnight low of 21.2°C.
May runs +3.0°C compared to Galveston's annual average high of 24.1°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 27.1°C and cooler evenings around 21.2°C.