September in Jietou averages a daily high of 24.9°C with nights around 16.8°C. Expect roughly 19.3 wet days totalling 187mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Jietou is November–March.
Based on TENGCHONG, CH (38.5km), 1995–2024. 23 years of September data.