May in Neuwied averages a daily high of 18°C with nights around 8.1°C. Expect roughly 13.9 wet days totalling 83.6mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Neuwied is June–September.
Based on HUMMERICH, GM (14.8km), 1995–2024. 20 years of May data.