January in Potsdam averages a daily high of 3.2°C with nights around -1.8°C. Expect roughly 14.3 wet days totalling 44.6mm. 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 January data.