July in Sanya averages a daily high of 30.7°C with nights around 24.3°C. Expect roughly 16.5 wet days totalling 305.4mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Sanya is November–March.
Based on SANYA, CH (8.8km), 1995–2024. 24 years of July data.