February in San Francisco is the rainiest and the cloudiest month of the year. In February, the weather in San Francisco is typically warm. Average daily high temperature in February is about 14 degrees above zero. On average, San Francisco has 11 sunny, 11 partly cloudy, and 7 rainy days in February. The rains are usually heavy. February as well as January, March, and December is considered the most uncomfortable time to visit San Francisco.