In May, Haikou typically sees daytime highs of 31.7°C and overnight lows around 24.4°C. Compared to the annual average high of 27.7°C, May runs +4.0°C.
May in Haikou averages a daytime high of 31.7°C and an overnight low of 24.4°C.
May runs +4.0°C compared to Haikou's annual average high of 27.7°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 31.7°C and cooler evenings around 24.4°C.