February in San Bernardino is the cloudiest month of the year. In February, the weather in San Bernardino is typically warm. Average daily high temperature in February is about 13 degrees above zero. On average, San Bernardino has 16 sunny, 10 partly cloudy, 2 rainy, and 1 cloudy day in February. The rains are usually heavy. February as well as January and December is considered the most uncomfortable time to visit San Bernardino.