September in Pu'er averages a daily high of 26.9°C with nights around 18.7°C. Expect roughly 17.8 wet days totalling 176.9mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Pu'er is November–March.
Based on SIMAO, CH (2.5km), 1995–2024. 23 years of September data.