If you're looking for summer vibes, the best time to travel to Santander is in August, July and September, when the average temperature reaches 24.72 °C, while October, June and August are the 3 sunniest months of the year, with an average of 92.64 hours.
However, if you prefer colder temperatures, make sure you visit Santander during January, February or December to experience an average of 4.21 °C.
For those who don't care too much about temperatures, but want to avoid getting wet in the rain, it's important to avoid travelling during January, February and March, when the average precipitation in Santander is 6.75 mm, while the months of January, February and March are drier, with an average of 0 mm.