Santander weather in December
Temperature, sea and sunshine in December: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in December
Poor
Best time to visit: May – October
What is the weather like in Santander in December?
In December, Santander is cool: daytime highs average 13 °C, and nights cool down to about 8 °C. The sea averages 14.3 °C – swimming is only for the hardy. The sun is scarce, with only about 3 hours a day. It rains often – on about 14 days, adding up to 117 mm. All in all, December is not an ideal month for a holiday in Santander.
December compared
How the weather changes from November to January. Tap a month to open it.
| NovemberNov | DecemberDec | JanuaryJan | |
|---|---|---|---|
| Score | 39 | 33 | 27 |
| Day | 15° | 13° | 12° |
| Night | 10° | 8° | 7° |
| Sea | 16° | 14° | 13° |
| Sun | 3 h | 3 h | 3 h |
| Rain days | 17 | 14 | 15 |
More details for December
- Daylight
- 8 h 59 min08:41 – 17:40
- UV index
- 1 · lowclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 21 km/haverage daily peakAll months
- Cloud cover
- 69 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC+1Europe/Madrid
How the score comes together
- Temperatureweight 50 %51 %
- Sunshineweight 20 %0 %
- Few rainy daysweight 30 %26 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in December
- A jumper for the evenings
- Rain jacket or umbrella
Santander in December: quick answers
Is Santander hot in December?
No. In December, Santander is cool: daytime highs average 13 °C and nights drop to about 8 °C.
Can you swim in Santander in December?
Only if you don't mind cold water: in December the sea averages just 14.3 °C. Comfortable swimming is possible from July to September.
Does it rain much in Santander in December?
It rains often – on about 14 days, adding up to 117 mm.
Santander month by month
The whole year in SantanderAll destinations: SpainWhere to go in DecemberSea temperature in December
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences