December in Heihe averages a daily high of -14.7°C with nights around -23.8°C. Expect roughly 5.9 wet days totalling 10.1mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Heihe is May–June.
Based on BLAGOVESCENSK, RS (1km), 1995–2024. 29 years of December data.