January in Ruda Slaska is the snowiest, the cloudiest, and the coldest month of the year. In January, the weather in Ruda Slaska is typically freezing. Average daily high temperature in January is about zero. On average, Ruda Slaska has 15 cloudy, 7 snowy, 5 rainy, 3 sunny, and 1 partly cloudy day in January. The snowfalls are usually moderate. January as well as February, March, November, and December is considered the most uncomfortable time to visit Ruda Slaska.