October in Bonn averages a daily high of 15.4°C with nights around 7.6°C. Expect roughly 13.2 wet days totalling 59.2mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Bonn is May–September.
Based on BONN ROLEBER, GM (6.9km), 1995–2024. 25 years of October data.