June in Koblenz averages a daily high of 22.3°C with nights around 10.9°C. Expect roughly 12.3 wet days totalling 70.8mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Koblenz is June–September.
Based on MONTABAUR, GM (18.7km), 1995–2024. 17 years of June data.