December in Dalian averages a daily high of 2.6°C with nights around -3.6°C. Expect roughly 3.4 wet days totalling 10.3mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Dalian is May–June.
Based on DALIAN, CH (3km), 1995–2024. 18 years of December data.