October in Oslo averages a daily high of 10°C with nights around 4.2°C. Expect roughly 13.2 wet days totalling 97.2mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Oslo is June–September.
Based on OSLO BLINDERN, NO (3.6km), 1995–2024. 30 years of October data.