July in Kerpen averages a daily high of 24.9°C with nights around 13.3°C. Expect roughly 12.8 wet days totalling 66.8mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Kerpen is May–September.
Based on WEILERSWIST LOMMERSUM, GM (18.7km), 1995–2024. 29 years of July data.