May in Heyuan averages a daily high of 30.1°C with nights around 22.2°C. Expect roughly 16.4 wet days totalling 284.5mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Heyuan is November–December.
Based on HEYUAN, CH (9km), 1995–2024. 24 years of May data.