December in Mianyang averages a daily high of 8.5°C with nights around 1.2°C. Expect roughly 3.8 wet days totalling 7.3mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Mianyang is March–May.
Based on HANZHONG, CH (33.1km), 1995–2024. 26 years of December data.