December in Osnabrück averages a daily high of 6.2°C with nights around 2°C. Expect roughly 18.1 wet days totalling 69mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Osnabrück is May–September.
Based on BELM, GM (9.6km), 1995–2024. 15 years of December data.