January in Bern is the coldest month of the year. In January, the weather in Bern is typically cold. Average daily high temperature in January is about 2 degrees above zero. On average, Bern has 13 partly cloudy, 9 rainy, 8 sunny, and 1 cloudy day in January. The rains are usually light. January as well as February, March, April, and May is considered the most uncomfortable time to visit Bern.