April in Lausanne averages a daily high of 15.1°C with nights around 3.7°C. Expect roughly 10.6 wet days totalling 60.9mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Lausanne is June–September.
Based on PAYERNE, SZ (41.3km), 1995–2024. 30 years of April data.