December in Gdańsk averages a daily high of 3.2°C with nights around -0.6°C. Expect roughly 16.8 wet days totalling 56.1mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Gdańsk is May–September.
Based on ELBLAG MILEJEWO, PL (54.9km), 1995–2024. 10 years of December data.