January weather forecast in Flagstaff

January in Flagstaff is the snowiest and the coldest month of the year. In January, the weather in Flagstaff is typically cold. Average daily high temperature in January is about 5 degrees above zero. On average, Flagstaff has 15 sunny, 8 partly cloudy, 5 cloudy, 2 snowy, and 1 rainy day in January. The snowfalls are usually moderate. January as well as February, March, July, and August is considered the most uncomfortable time to visit Flagstaff.