June in Troisdorf averages a daily high of 23.2°C with nights around 11.3°C. Expect roughly 12.9 wet days totalling 83.4mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Troisdorf is May–September.
Based on KOLN BONN, GM (6.3km), 1995–2024. 30 years of June data.