May in Rosenheim averages a daily high of 19.8°C with nights around 8.1°C. Expect roughly 16 wet days totalling 126.6mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Rosenheim is May–September.
Based on ROSENHEIM, GM (2.2km), 1995–2024. 29 years of May data.