January in Roznov pod Radhostem is the snowiest and the most freezing month of the year. In January, the weather in Roznov pod Radhostem is typically freezing. Average daily high temperature in January is about 2 degrees below zero. On average, Roznov pod Radhostem has 17 snowy, 11 cloudy, and 3 sunny days in January. The snowfalls are usually moderate.