May in Berchtesgaden is the cloudiest month of the year. In May, the weather in Berchtesgaden is typically warm. Average daily high temperature in May is about 16 degrees above zero. On average, Berchtesgaden has 21 rainy, 5 partly cloudy, 4 sunny, and 1 cloudy day in May. The rains are usually heavy. May as well as January, February, March, and April is considered the most uncomfortable time to visit Berchtesgaden.