December in Jianchang averages a daily high of 13°C with nights around 4.5°C. Expect roughly 8.7 wet days totalling 54.7mm. 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 December data.