January weather forecast in Grayson

January in Grayson is the windiest and the coldest month of the year. In January, the weather in Grayson is typically cold. Average daily high temperature in January is about 3 degrees above zero. On average, Grayson has 10 cloudy, 9 rainy, 7 sunny, and 5 partly cloudy days in January. The rains are usually heavy. January as well as February, March, and December is considered the most uncomfortable time to visit Grayson.