July in Arnsberg averages a daily high of 24°C with nights around 11°C. Expect roughly 14.7 wet days totalling 102.1mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Arnsberg is May–September.
Based on ARNSBERG NEHEIM, GM (11.6km), 1995–2024. 19 years of July data.