May in Dorsten averages a daily high of 19.5°C with nights around 8.2°C. Expect roughly 12.3 wet days totalling 59.5mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Dorsten is May–September.
Based on BORKEN IN WESTFALEN, GM (24.2km), 1995–2024. 20 years of May data.