In December, Haikou typically sees daytime highs of 15.2°C and overnight lows around 3.5°C. Compared to the annual average high of 20.9°C, December runs -5.7°C.
December in Haikou averages a daytime high of 15.2°C and an overnight low of 3.5°C.
December runs -5.7°C compared to Haikou's annual average high of 20.9°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 15.2°C and cooler evenings around 3.5°C.