October in Skien averages a daily high of 10.3°C with nights around 3.2°C. Expect roughly 13.3 wet days totalling 86mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Skien is June–September.
Based on GVARV NES, NO (30.1km), 1995–2024. 27 years of October data.