December in Köpenick averages a daily high of 4.2°C with nights around -0.8°C. Expect roughly 13.7 wet days totalling 38.9mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Köpenick is May–September.
Based on BERLIN SCHONEFELD, GM (7.6km), 1995–2024. 30 years of December data.