May in Neu-Ulm averages a daily high of 17°C with nights around 6.1°C. Expect roughly 14.7 wet days totalling 97.7mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Neu-Ulm is June–September.
Based on MERKLINGEN, GM (22.5km), 1995–2024. 30 years of May data.