September in Neu-Ulm averages a daily high of 17.9°C with nights around 7.4°C. Expect roughly 11.8 wet days totalling 63.9mm. 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 September data.