January in Smolensk is the snowiest and the most freezing month of the year. In January, the weather in Smolensk is typically freezing. Average daily high temperature in January is about 4 degrees below zero. On average, Smolensk has 19 cloudy, 6 snowy, 2 rainy, 2 sunny, and 2 partly cloudy days in January. The snowfalls are usually light.