January weather forecast in Littleton

January in Littleton is the coldest month of the year. In January, the weather in Littleton is typically cold. Average daily high temperature in January is about 3 degrees above zero. On average, Littleton has 15 sunny, 7 partly cloudy, 5 snowy, 3 cloudy, and 1 rainy day in January. The snowfalls are usually light. January as well as February, May, June, and July is considered the most uncomfortable time to visit Littleton.