December in Katowice is the windiest month of the year. In December, the weather in Katowice is typically cold. Average daily high temperature in December is about 2 degrees above zero. On average, Katowice has 12 cloudy, 10 rainy, 4 sunny, 3 partly cloudy, and 2 snowy days in December. The rains are usually light. December as well as January, February, March, and April is considered the most uncomfortable time to visit Katowice.