December in Potsdam averages a daily high of 3.9°C with nights around -0.6°C. Expect roughly 15 wet days totalling 46.3mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Potsdam is May–September.
Based on POTSDAM, GM (1.7km), 1995–2024. 30 years of December data.