August in Lausanne is the sunniest month of the year. In August, the weather in Lausanne is typically warm. Average daily high temperature in August is about 20 degrees above zero. On average, Lausanne has 18 sunny, 7 rainy, and 6 partly cloudy days in August. The rains are usually moderate. August as well as {{month_nom: February}}, and {{month_nom: February}} is considered the most comfortable time to visit Lausanne.