San Sebastian weather
Our guide to the weather in San Sebastian during December
We've looked at the most up-to-date weather data for San Sebastian, covering the last 12 years up to 2024, plus we've asked our team of travel bloggers for their first-hand experiences in order to answer the most frequently asked questions about San Sebastian weather in December.
How warm is it in San Sebastian during December?
The temperature is extremely stable in December with average highs of 21℃ and lows just 1℃ lower at 20℃. The UV index will be moderate at this time of year, so not something to worry about for the average person. However, if you're going to be outside for long periods it's worth wearing a broad spectrum SPF 30+ sunscreen and UV-blocking sunglasses. Remember that bright surfaces, such as water and sand increase UV exposure.
Does it rain in San Sebastian during December?
December is typically the wettest month in San Sebastian. On average, in December you'll see rain on just one day in the month. In other words, you shouldn't see any of the wet stuff. You're not likely to see a thunderstorm during your trip.
Is it windy in San Sebastian during December?
You're unlikely to experience any strong winds. Expect a gentle breeze that increases to moderate at times during December. With moderate humidity and mild air temperatures, the breeze will have a slight cooling effect.
Is it too cold to swim in the sea in San Sebastian during December?
The water around San Sebastian is a bracing 14℃ during December and would be considered too cold for swimming. Those who are a bit more hardy or frequently swim in cooler open water might want to take a quick dip. A wetsuit would be advisable if you wish to spend longer than 5 minutes in the water.
Weather in San Sebastian
Our month-by-month guide to the weather and climate in San Sebastian
San Sebastian weather in
JanuarySan Sebastian weather in
FebruarySan Sebastian weather in
MarchSan Sebastian weather in
AprilSan Sebastian weather in
MaySan Sebastian weather in
JuneSan Sebastian weather in
JulySan Sebastian weather in
AugustSan Sebastian weather in
SeptemberSan Sebastian weather in
OctoberSan Sebastian weather in
NovemberSan Sebastian weather in
December