December in Regensburg averages a daily high of 3.1°C with nights around -1.5°C. Expect roughly 15.2 wet days totalling 53.1mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Regensburg is May–September.
Based on REGENSBURG, GM (3.1km), 1995–2024. 30 years of December data.