January in Clarksburg is the snowiest and the coldest month of the year. In January, the weather in Clarksburg is typically cold. Average daily high temperature in January is about 4 degrees above zero. On average, Clarksburg has 10 cloudy, 7 rainy, 6 partly cloudy, 5 sunny, and 3 snowy days in January. The rains are usually heavy. January as well as February, March, April, and November is considered the most uncomfortable time to visit Clarksburg.