July in Iserlohn averages a daily high of 21.9°C with nights around 12.3°C. Expect roughly 15.5 wet days totalling 100.5mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Iserlohn is June–September.
Based on LUDENSCHEID, GM (14.9km), 1995–2024. 30 years of July data.