December in Krnov is the windiest month of the year. In December, the weather in Krnov is typically cold. Average daily high temperature in December is about 2 degrees above zero. On average, Krnov has 16 cloudy, 6 rainy, 4 sunny, 4 partly cloudy, and 1 snowy day in December. The rains are usually light. December as well as January, February, March, and April is considered the most uncomfortable time to visit Krnov.