In June, the weather in Klosters-Serneus is typically warm. Average daily high temperature in June is about 13 degrees above zero. On average, Klosters-Serneus has 21 rainy, 8 sunny, and 1 partly cloudy day in June. The rains are usually heavy. June as well as March, April, May, and July is considered the most uncomfortable time to visit Klosters-Serneus.