September in Mölndal averages a daily high of 18.1°C with nights around 10.9°C. Expect roughly 13.1 wet days totalling 79.5mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Mölndal is June–August.
Based on GOTEBORG A, SW (6.8km), 1995–2024. 29 years of September data.