June in Gießen averages a daily high of 23.2°C with nights around 11.2°C. Expect roughly 11.4 wet days totalling 54.2mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Gießen is May–September.
Based on GIESSEN WETTENBERG, GM (2.3km), 1995–2024. 30 years of June data.