September in Hechi averages a daily high of 31.6°C with nights around 23°C. Expect roughly 8.4 wet days totalling 101.2mm. 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. 23 years of September data.