January in Haikou averages a daily high of 16.6°C with nights around 4.5°C. Expect roughly 3.5 wet days totalling 19.6mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Haikou is February–April.
Based on KUNMING, CH (28.5km), 1995–2024. 26 years of January data.