September in Jianchang averages a daily high of 30.4°C with nights around 21.9°C. Expect roughly 7.6 wet days totalling 77mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Jianchang is October.
Based on NANCHENG, CH (2.9km), 1995–2024. 29 years of September data.