December in Rostock averages a daily high of 4.9°C with nights around 1.1°C. Expect roughly 15.3 wet days totalling 50.5mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Rostock is June–September.
Based on ROSTOCK WARNEMUNDE, GM (11km), 1995–2024. 30 years of December data.