December in Mölndal averages a daily high of 4°C with nights around -0.4°C. Expect roughly 16.4 wet days totalling 91.6mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Mölndal is June–August.
Based on GOTEBORG A, SW (6.8km), 1995–2024. 28 years of December data.