In May, Haikou typically sees daytime highs of 25.2°C and overnight lows around 14.2°C. Compared to the annual average high of 20.9°C, May runs +4.3°C.
May in Haikou averages a daytime high of 25.2°C and an overnight low of 14.2°C.
May runs +4.3°C compared to Haikou's annual average high of 20.9°C, ranking #1 of 12 months by warmth.
Plan for daytime highs near 25.2°C and cooler evenings around 14.2°C.