December in Krosno is the windiest month of the year. In December, the weather in Krosno is typically cold. Average daily high temperature in December is about 1 degree above zero. On average, Krosno has 14 cloudy, 9 rainy, 3 sunny, 3 partly cloudy, and 2 snowy days in December. The rains are usually light. December as well as February, March, April, and May is considered the most uncomfortable time to visit Krosno.