September in Humen averages a daily high of 31.9°C with nights around 24.3°C. Expect roughly 11.6 wet days totalling 204.9mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Humen is November–December.
Based on GUANGZHOU, CH (48.3km), 1995–2024. 19 years of September data.