March in Koblenz averages a daily high of 10°C with nights around 0.5°C. Expect roughly 12.4 wet days totalling 62.3mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Koblenz is June–September.
Based on MONTABAUR, GM (18.7km), 1995–2024. 17 years of March data.