June in Grindelwald is the rainiest month of the year. In June, the weather in Grindelwald is typically warm. Average daily high temperature in June is about 15 degrees above zero. On average, Grindelwald has 21 rainy, 5 partly cloudy, and 4 sunny days in June. The rains are usually heavy. June as well as April, May, July, and August is considered the most uncomfortable time to visit Grindelwald.