December in Longjiang averages a daily high of -10.2°C with nights around -20.7°C. Expect roughly 3.7 wet days totalling 5mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Longjiang is August–September.
Based on QIQIHAR, CH (54.6km), 1995–2024. 26 years of December data.