January in Konstanz averages a daily high of 3.9°C with nights around -1.1°C. Expect roughly 12.1 wet days totalling 49.2mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Konstanz is May–September.
Based on KONSTANZ, GM (2.3km), 1995–2024. 30 years of January data.