May in Witten averages a daily high of 19.5°C with nights around 8.1°C. Expect roughly 11.8 wet days totalling 59.8mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Witten is May–September.
Based on BOCHUM, GM (7km), 1995–2024. 13 years of May data.