December in Neuwied averages a daily high of 4.6°C with nights around 0.5°C. Expect roughly 18.3 wet days totalling 79.6mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Neuwied is June–September.
Based on HUMMERICH, GM (14.8km), 1995–2024. 21 years of December data.