In May, Haimen typically sees daytime highs of 27.4°C and overnight lows around 22.6°C. Compared to the annual average high of 24.7°C, May runs +2.7°C.
May in Haimen averages a daytime high of 27.4°C and an overnight low of 22.6°C.
May runs +2.7°C compared to Haimen's annual average high of 24.7°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 27.4°C and cooler evenings around 22.6°C.