In April, Haikou typically sees daytime highs of 28.6°C and overnight lows around 21.6°C. Compared to the annual average high of 27.7°C, April runs +0.9°C.
April in Haikou averages a daytime high of 28.6°C and an overnight low of 21.6°C.
April runs +0.9°C compared to Haikou's annual average high of 27.7°C, ranking #6 of 12 months by warmth.
Plan for daytime highs near 28.6°C and cooler evenings around 21.6°C.