January in Sanford is the coldest month of the year. In January, the weather in Sanford is typically cold. Average daily high temperature in January is about 8 degrees above zero. On average, Sanford has 13 partly cloudy, 12 sunny, 4 rainy, and 2 cloudy days in January. The rains are usually light. January as well as February, March, August, and December is considered the most uncomfortable time to visit Sanford.