September in Treptow averages a daily high of 20.4°C with nights around 11°C. Expect roughly 9.6 wet days totalling 45.4mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Treptow is May–September.
Based on BERLIN TEMPELHOF, GM (4km), 1995–2024. 30 years of September data.