October in Köln averages a daily high of 15.9°C with nights around 9°C. Expect roughly 13.9 wet days totalling 64.2mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Köln is May–September.
Based on KOLN STAMMHEIM, GM (6.7km), 1995–2024. 28 years of October data.