January in Lausanne averages a daily high of 3.9°C with nights around -1.7°C. Expect roughly 11.2 wet days totalling 53mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Lausanne is June–September.
Based on PAYERNE, SZ (41.3km), 1995–2024. 29 years of January data.