June in Lausanne is the rainiest month of the year. In June, the weather in Lausanne is typically warm. Average daily high temperature in June is about 19 degrees above zero. On average, Lausanne has 19 rainy, 10 sunny, and 1 partly cloudy day in June. The rains are usually heavy. June as well as January, February, March, and April is considered the most uncomfortable time to visit Lausanne.