Normal weather for San Sebastián in December
It's cool to moderate in December in San Sebastián with an average temperature of 16°C. Temperatures this month range from a low of 14°C to a high of 18°C. At night, you can expect temperatures between 6°C and 11°C.
In December, there is an average of 136 mm of precipitation, spread over 17 days. The wind speed is around 4 Bft, mostly coming from the Southwest.
San Sebastián in December |
London | ||
|---|---|---|---|
 Average Temperature |
16°C | 9°C | |
 High Temp |
18°C | 11°C | |
| Low Temp |
14°C | 8°C | |
 Total Precipitation |
136 mm | 67 mm | |
| Rainy Days |
17 days | 10 days | |
Start of December
The month of December starts in San Sebastián with cool temperatures, averaging around 16°C during the day and nights close to 9°C. Plenty of days with a chance of precipitation.
Since temperatures can differ between day and night, it’s a good idea to dress in layers. During the day, go for a light coat, jumper or cardigan, and long trousers. In the evening and morning, we recommend a warm coat, jumper or cardigan, and long trousers.
Mid-December
By mid-December, the average daytime temperature rises to around 17°C, with nights close to 9°C. There might be a few showers during this period, but plenty of dry days with sunshine too.
Temperatures vary between day and night, so it’s smart to wear layers. During the day, go for a light coat, jumper or cardigan, and long trousers. In the evening and morning, we recommend a warm coat, jumper or cardigan, and long trousers.
End of December
By the end of December, the average daytime temperature in San Sebastián will be around 17°C, with nights close to 8°C. A shower might show up, but overall the weather will be dry and sunny.
As it gets cooler in the evening, it’s best to wear layers. During the day, go for a light coat, jumper or cardigan, and long trousers. In the evening and morning, we recommend a warm coat, jumper or cardigan, and long trousers.
Discover cheap trips to San Sebastián 
UV index
The UV index is a maximum of 4 this month. That's a moderate value on the intensity scale of 1 to 11. Unprotected skin can burn in about 30 minutes.
Is December a good time to visit San Sebastián?
Looking for sun and warm weather? Then December isn’t the best time to be in San Sebastián. The temperature is too low this month for a warm stay.
Temperature records for San Sebastián in December
With 25°C, San Sebastián hit the highest temperature in the last 10 years in December 2022. The lowest daytime temperature in this month was 7°C in 2014. The extreme night temperatures ranged from a low of -5°C to a high of 20°C.
Check out the climate of San Sebastián for all months and discover the best travel time
Curious about the climate in other parts of Spain? Check out the weather and climate in places like Ibiza, Majorca, Tenerife, or have a look at other destinations in Spain.
November
Plan your next holiday
Don’t miss the best holiday deals for San Sebastián and see what our partners have for you.
Daily Temperature in December in San Sebastián
This chart shows the average daily temperatures, both day and night, for each day in December in San Sebastián, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in December in San Sebastián
The chart below shows the average daily precipitation in December for San Sebastián, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for December, you can expect around 17 days of rain in San Sebastián.
Daily UV Index in December in San Sebastián
This chart shows the average daily UV index in December in San Sebastián, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in December in San Sebastián Over the Years
This chart shows the average temperature in December in San Sebastián, measured in degrees Celsius, over the past years.
Total Precipitation in December in San Sebastián Over the Years
This chart shows the average precipitation in December in San Sebastián, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in December for San Sebastián
Click on a specific day in December for detailed info on the typical weather on that day in San Sebastián. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in December in San Sebastián
Have you been to San Sebastián in December?
Share your weather experience in December in San Sebastián.
Average Weather in San Sebastián by Month
Click on a month below to see detailed weather info for San Sebastián. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of San Sebastián for all months at once
