January in Santander is the rainiest and the cloudiest month of the year. In January, the weather in Santander is typically warm. Average daily high temperature in January is about 11 degrees above zero. On average, Santander has 15 rainy, 7 sunny, 6 partly cloudy, and 3 cloudy days in January. The rains are usually heavy. January as well as February and November is considered the most uncomfortable time to visit Santander.