May in Gummersbach averages a daily high of 18.8°C with nights around 8.1°C. Expect roughly 13.4 wet days totalling 76.6mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Gummersbach is May–September.
Based on NEUNKIRCHEN SEELSCHEID KRAWINK, GM (24.2km), 1995–2024. 30 years of May data.