January in Sanya averages a daily high of 24.3°C with nights around 16.3°C. Expect roughly 4.6 wet days totalling 12.5mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Sanya is November–March.
Based on SANYA, CH (8.8km), 1995–2024. 25 years of January data.