June in Heilbronn averages a daily high of 25°C with nights around 12.3°C. Expect roughly 11.8 wet days totalling 72.7mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Heilbronn is May–September.
Based on OBERSULM WILLSBACH, GM (9.7km), 1995–2024. 20 years of June data.