December in Yan’an averages a daily high of 4.3°C with nights around -8.8°C. Rain is rare — about 1.5 wet days and 2.2mm across the month. A hard month to visit for comfort alone.
Across the year, the best time to visit Yan’an is April–May.
Based on YAN AN, CH (0.8km), 1995–2024. 26 years of December data.