January in Roanoke is the coldest month of the year. In January, the weather in Roanoke is typically cold. Average daily high temperature in January is about 4 degrees above zero. On average, Roanoke has 14 partly cloudy, 10 sunny, 5 rainy, and 2 cloudy days in January. The rains are usually moderate. January as well as February, March, and December is considered the most uncomfortable time to visit Roanoke.