October in Siegen averages a daily high of 13.9°C with nights around 4.9°C. Expect roughly 14.2 wet days totalling 66mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Siegen is May–September.
Based on DILLENBURG, GM (23.1km), 1995–2024. 27 years of October data.