January in Katowice is the snowiest and the coldest month of the year. In January, the weather in Katowice is typically freezing. Average daily high temperature in January is about zero. On average, Katowice has 12 cloudy, 7 partly cloudy, 4 rainy, 4 snowy, and 4 sunny days in January. The rains are usually light. January as well as February, March, April, and May is considered the most uncomfortable time to visit Katowice.