San Sebastián in December
In December, San Sebastián averages 14°C (57°F) during the day and 8°C (47°F) at night, with frequent rain — about 15 days of the month see precipitation (177 mm total).
ShoulderConditions are cool — bring a jacket for evenings. Plan for unsettled weather and bring rain gear.
December is one of the wetter and less comfortable months in San Sebastián. If your dates are flexible, consider a different time of year.
How December compares to the rest of the year in San Sebastián
December is one of the coolest months in San Sebastián (10th of 12) and moderately rainy compared to the rest of the year (6th of 12). Daytime temperature runs 4°C below the annual average (18°C). December runs 2°C cooler than November (15°C) and cools 2°C in January (12°C).
December sunrise & sunset in San Sebastián
Times shown for San Sebastián local time (Europe/Madrid), calculated for the 15th of December. They shift by a few minutes day to day across the month.
Photography light in San Sebastián — December
Golden-hour and blue-hour windows for the 15th of December, in San Sebastián's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — San Sebastián in December
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on December's tier (Shoulder) and San Sebastián's popularity.
Crowds & pricing — December in San Sebastián
San Sebastián is in a shoulder season month — fewer crowds, slightly lower prices, and a calmer atmosphere than peak weeks. Most major sights stay open with normal hours, though a handful of seasonal restaurants or boat trips may run reduced schedules. Many regulars consider these months the best time to visit because you trade a small amount of weather reliability for a much more pleasant on-the-ground experience.
Why this tier: Christmas / New Year travel surge
Sun & mosquito risk — December in San Sebastián
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
San Sebastián in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 12°C / 53°F | 6°C / 43°F | 220 mm | 17 | — |
| February | 13°C / 56°F | 7°C / 44°F | 166 mm | 15 | — |
| March | 15°C / 58°F | 8°C / 46°F | 155 mm | 17 | — |
| April | 17°C / 62°F | 10°C / 49°F | 118 mm | 14 | — |
| May | 19°C / 66°F | 12°C / 53°F | 122 mm | 16 | — |
| June | 22°C / 71°F | 15°C / 59°F | 106 mm | 14 | — |
| July | 23°C / 74°F | 17°C / 63°F | 76 mm | 13 | — |
| August | 24°C / 75°F | 17°C / 63°F | 102 mm | 12 | — |
| September | 23°C / 73°F | 16°C / 60°F | 112 mm | 12 | — |
| October | 20°C / 69°F | 14°C / 56°F | 121 mm | 13 | — |
| November | 15°C / 60°F | 10°C / 50°F | 229 mm | 18 | — |
| December | 14°C / 57°F | 8°C / 47°F | 177 mm | 15 | — |
Other cities with similar December weather
🌍 See the full ranked list of climate twins for San Sebastián in December →
Frequently asked questions
How hot is San Sebastián in December?
In December, San Sebastián averages a high of 14°C (57°F) and a low of 8°C (47°F) — generally cool.
Does it rain a lot in San Sebastián in December?
December is quite rainy in San Sebastián, with about 15 rainy days on average.
Is December a good time to visit San Sebastián?
December is cool but on the rainy side. It suits travelers who are comfortable with cool weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for San Sebastián in December?
Pack a warm jacket and layers, plus a compact umbrella or rain jacket. See the full December packing list for San Sebastián for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.