June in Hamm averages a daily high of 22.5°C with nights around 11.1°C. Expect roughly 12.4 wet days totalling 63.1mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Hamm is May–September.
Based on WERL, GM (12.3km), 1995–2024. 21 years of June data.