SeasonMapSantander weather in December
Spain
December in Santander: cool, soaked, with clean air — a gamble, with 13 rainy days.
#11 of 12 months in Santander · #905 of 1383 destinations to visit in December · comfort 63/100 (tier C)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Santander in December
Other months in Santander
Santander's forum describes July as mild rather than hot by Spanish standards, with beautiful sunshine possible but never guaranteed on the Bay of Biscay coast. Regulars are candid that this 'Green Coast' region stays damp and humid much of the time thanks to the surrounding mountains, and that a morning drizzle turning to afternoon sun (or the reverse) is a completely normal pattern.
Add your own note from Santander's card on the map.
Santander climate normals — December
| Daytime high | 15°C / 59°F | 🙂 cool |
|---|---|---|
| Nighttime low | 10°C / 49°F | |
| Feels like (high) | 13°C / 55°F | |
| Sea temperature | 15°C / 60°F | 🥶 cold sea |
| Rainfall | 161 mm / 6.3 in | ⛈ soaked |
| Rainy days | 13 days | |
| Humidity | 83% | 💦 very humid |
| Dew point | 8°C / 46°F | |
| Sunshine | 5.9 h/day | |
| Daylight | 9 h | |
| Wind | 21 km/h / 13 mph | |
| Air quality (US AQI) | 37 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Santander in December
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
BusyChristmas holidays in Spain, school holidays in 6 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Santander's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Toughest weatherSantander's weather peaks June–August, best around July.
Best weatherFair weatherToughest weather
What's on in Santander in December
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Autumn and winter swell
15 Sep – 31 Mar · usuallySurf seasonThe Atlantic starts sending proper groundswell in September. Somo across the bay picks it up first, and by January the storms are big enough to close the Sardinero promenade.
Nearby, and something's on
Within 300 km of Santander — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Santander?
Santander in December — FAQ
- Is December a good time to visit Santander?
- December in Santander: cool, soaked, with clean air — a gamble, with 13 rainy days. It ranks #11 of 12 months for Santander on SeasonMap's comfort score (63/100).
- What is the weather like in Santander in December?
- In December, Santander averages a daily high of 14.9°C and a low of 9.7°C, with about 160.9 mm of rain over roughly 13.3 rainy days.
- What is the air quality in Santander in December?
- Santander has a mean US Air Quality Index of about 37 in December.
Other months in Santander
Compare Santander in December
Warmer or cooler than Santander in December
Similar destinations in Southern Europe — December
Within 300 km: Bilbao's Santo Tomas fair on 21 Dec, and San Sebastián's Autumn and winter swell around 15 Sep – 31 Mar.