January in Penzberg is the snowiest and the coldest month of the year. In January, the weather in Penzberg is typically cold. Average daily high temperature in January is about 1 degree above zero. On average, Penzberg has 14 rainy, 6 partly cloudy, 5 sunny, 4 cloudy, and 2 snowy days in January. The rains are usually moderate. January as well as February, March, April, and May is considered the most uncomfortable time to visit Penzberg.