May in Hechi averages a daily high of 29.5°C with nights around 21.6°C. Expect roughly 14.6 wet days totalling 205.7mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Hechi is October–December.
Based on HECHI, CH (3.5km), 1995–2024. 24 years of May data.