February in Boise is the cloudiest month of the year. In February, the weather in Boise is typically cold. Average daily high temperature in February is about 5 degrees above zero. On average, Boise has 9 rainy, 8 cloudy, 7 partly cloudy, and 5 sunny days in February. The rains are usually moderate. February as well as January, March, November, and December is considered the most uncomfortable time to visit Boise.