January in Troisdorf averages a daily high of 5.8°C with nights around 0.1°C. Expect roughly 15.6 wet days totalling 64mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Troisdorf is May–September.
Based on KOLN BONN, GM (6.3km), 1995–2024. 30 years of January data.