February in San Sebastian is the coldest month of the year. In February, the weather in San Sebastian is typically warm. Average daily high temperature in February is about 11 degrees above zero. On average, San Sebastian has 15 rainy, 8 partly cloudy, 4 sunny, and 2 cloudy days in February. The rains are usually heavy. February as well as January, March, April, and May is considered the most uncomfortable time to visit San Sebastian.