May in Konstanz averages a daily high of 20.2°C with nights around 9.5°C. Expect roughly 13.8 wet days totalling 96.6mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Konstanz is May–September.
Based on KONSTANZ, GM (2.3km), 1995–2024. 30 years of May data.