May in Jianchang averages a daily high of 28°C with nights around 19.6°C. Expect roughly 16.2 wet days totalling 274.8mm. 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. 30 years of May data.