January in Rosenheim averages a daily high of 3.6°C with nights around -3.5°C. Expect roughly 14.1 wet days totalling 57.4mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Rosenheim is May–September.
Based on ROSENHEIM, GM (2.2km), 1995–2024. 30 years of January data.