Weather in Donostia / San Sebastián for December 2025
Until now, December 2025 in Donostia / San Sebastián has been nearly identical to the historical average, with a temperature of 13.1 °C (showing only a slight deviation of 0.4 °C).
The forecast for the next days in Donostia / San Sebastián predicts temperatures to be around 13 °C, close to the historical average.
In general, the average temperature in Donostia / San Sebastián at the beginning of December is 12.7 °C. As the month progressed, temperatures tended to slightly increase, reaching an average of 13 °C by the end of December.
Donostia / San Sebastián experiences heavy rainfall in December, with over 20 rainy days and an average total precipitation 170.3 mm.
Is December a good time to visit Donostia / San Sebastián? check out the best time to travel to Donostia / San Sebastián page.
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Donostia / San Sebastián Weather December
Temperatures trend during December in Donostia / San Sebastián
December weather in Donostia / San Sebastián day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Dec. |  Partly cloudy | 15° /8° | 7.2 mm | 4 | |
| 2 Dec. |  Light rain shower | 11° /7° | 9.8 mm | 2 | |
| 3 Dec. | Light rain shower | 12° /6° | 11.7 mm | 3 | |
| 4 Dec. | Light rain shower | 11° /7° | 23.4 mm | 3 | |
| 5 Dec. | Light rain shower | 13° /7° | 9.9 mm | 3 | |
| 6 Dec. | Partly cloudy | 14° /9° | 2.7 mm | 4 | |
| 7 Dec. |  Light rain | 13° /8° | 7.2 mm | 4 | |
| 8 Dec. | Light rain shower | 12° /8° | 15.4 mm | 3 | |
| 9 Dec. | Light drizzle | 14° /7° | 6.6 mm | 4 | |
| 10 Dec. | Partly cloudy | 12° /8° | 4 mm | 3 | |
| 11 Dec. |  Overcast | 13° /7° | 0.2 mm | 3 | |
| 12 Dec. | Light rain | 13° /7° | 3.2 mm | 3 | |
| 13 Dec. |  Moderate or heavy rain with thunder | 12° /7° | 6.3 mm | 4 | |
| 14 Dec. | Light rain shower | 13° /7° | 5.7 mm | 3 | |
| 15 Dec. | Partly cloudy | 15° /8° | 0.1 mm | 0.2 | |
| 16 Dec. | Patchy rain possible | 15° /9° | 0.6 mm | 0.1 | |
| 17 Dec. | Patchy rain possible | 14° /8° | 0.6 mm | 0.1 | |
| 18 Dec. |  Sunny | 16° /8° | 0 mm | 0.2 | |
| 19 Dec. |  Moderate rain | 14° /8° | 13.5 mm | 0 | |
| 20 Dec. | Moderate rain | 11° /8° | 6.9 mm | 2 | |
| 21 Dec. | Patchy rain possible | 12° /6° | 0.2 mm | 2 | |
| 22 Dec. | Partly cloudy | 13° /7° | 0 mm | 3 | |
| 23 Dec. | Patchy rain possible | 13° /8° | 0.5 mm | 3 | |
| 24 Dec. | Patchy rain possible | 14° /11° | 0.9 mm | 3 | |
| 25 Dec. | Patchy rain possible | 13° /10° | 0.4 mm | 3 | |
| 26 Dec. | Patchy rain possible | 12° /8° | 0.6 mm | 3 | |
| 27 Dec. | Patchy rain possible | 11° /8° | 0.4 mm | 2 | |
| 28 Dec. | Patchy rain possible | 12° /7° | 0.1 mm | 2 | |
| 29 Dec. | Patchy rain possible | 13° /8° | 2.9 mm | 3 | |
| 30 Dec. | Overcast | 15° /7° | 0.2 mm | 4 | |
| 31 Dec. | Partly cloudy | 15° /7° | 5.4 mm | 4 | |
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Donostia / San Sebastián weather in December vs November vs January
| November | December | January | |
|---|---|---|---|
| Weather | Patchy rain possible | Patchy rain possible | Patchy rain possible |
| Temperatures | 16°/10° | 13°/7° | 11°/6° |
| Rainfall | 186 mm | 170 mm | 137 mm |
| Snowfall | 0 cm | 0 cm | 0 cm |
| Wind | 19 km/h | 18.8 km/h | 19 km/h |
| Humidity | 80% | 80% | 78% |
| Rainy days | 21 days | 22 days | 23 days |
| Snow days | 0 days | 0 days | 0 days |
| Dry days | 9 days | 9 days | 8 days |
Planning a trip to Donostia / San Sebastián? Discover the best time to visit
Donostia / San Sebastián in December - FAQ
What to pack to Donostia / San Sebastián in December?
As you prepare for your trip to Donostia / San Sebastián in December, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Donostia / San Sebastián, during December, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Warm Clothing: Sweaters, hoodies, long pants
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Scarves: To protect you from the cold wind
- Gloves/Mittens: Essential for cold weather
- Warm Hats: Warm hats for insulation in cold weather
- Umbrellas/Raincoats: For rainy days
December rainfall patterns in Donostia / San Sebastián
Quick links
Where is Donostia / San Sebastián?Get accurate weather forecasts for Donostia / San Sebastián, located at latitude 43.313 and longitude -1.975. Stay updated with localized weather information tailored for Donostia / San Sebastián.