October in Altona averages a daily high of 14.4°C with nights around 7.2°C. Expect roughly 14.6 wet days totalling 63.8mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Altona is May–September.
Based on HAMBURG NEUWIEDENTHAL, GM (8.2km), 1995–2024. 30 years of October data.