March in Troisdorf averages a daily high of 11.5°C with nights around 2°C. Expect roughly 14 wet days totalling 55.8mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Troisdorf is May–September.
Based on KOLN BONN, GM (6.3km), 1995–2024. 30 years of March data.