In February, the weather in Flagstaff is typically cold. Average daily high temperature in February is about 6 degrees above zero. On average, Flagstaff has 16 sunny, 8 partly cloudy, 2 rainy, 2 snowy, and 1 cloudy day in February. The rains are usually heavy. February as well as January, March, July, and August is considered the most uncomfortable time to visit Flagstaff.