September in Potsdam averages a daily high of 20.3°C with nights around 10.6°C. Expect roughly 9.7 wet days totalling 46mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Potsdam is May–September.
Based on POTSDAM, GM (1.7km), 1995–2024. 30 years of September data.