December in Xincheng averages a daily high of 0°C with nights around -10.9°C. Rain is rare — about 1.5 wet days and 1.9mm across the month. A hard month to visit for comfort alone.
Across the year, the best time to visit Xincheng is April–May.
Based on KUQA, CH (1.5km), 1995–2024. 26 years of December data.