January in Katowice is the snowiest, the cloudiest, and the most freezing 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, 8 snowy, 7 rainy, 3 sunny, and 1 partly cloudy day in January. The snowfalls are usually moderate. January as well as February, March, April, and November is considered the most uncomfortable time to visit Katowice.