December in Haicheng averages a daily high of -0.3°C with nights around -9.7°C. Rain is rare — about 2 wet days and 7.6mm across the month. A hard month to visit for comfort alone.
Across the year, the best time to visit Haicheng is May–June.
Based on YINGKOU, CH (50.5km), 1995–2024. 26 years of December data.