Last updated: February 6, 2025
In December, San Sebastian experiences a distinct winter climate characterized by mild temperatures that range from a maximum of 18°C (64°F) to a chilly minimum of -1°C (31°F), with an average temperature around 9°C (49°F). This month witnesses considerable precipitation, totaling 217 mm (8.5 inches) across approximately 17 rainy days, creating a lush, green landscape. The city’s humidity levels peak at a high 87%, contributing to a crisp atmosphere that enhances the festive charm of the holiday season. Whether you’re exploring the delightful streets or indulging in local cuisine, December's weather adds a unique touch to the enchanting ambiance of San Sebastian.
In San Sebastian, December marks a transition into the cooler heart of winter, with temperatures that reflect this seasonal shift. The month typically sees a minimum of around -1°C (31°F), while the average temperature hovers near 9°C (49°F), peaking at a maximum of 18°C (64°F). Compared to the milder temperatures of the preceding months, December feels notably brisk, especially as it follows the warmth of autumn. Residents and visitors alike experience a refreshing chill in the air, offering a perfect backdrop for cozy gatherings and festive celebrations. This cool weather marks a time of year when San Sebastian's vibrant culture shines through, inviting all to enjoy its scenic beauty wrapped in winter's embrace.
In December, San Sebastian experiences its wettest month of the year, with an impressive 217 mm (8.5 in) of precipitation recorded over 17 days. This significant increase from the preceding months, particularly following November's 190 mm, underscores a clear trend towards heightened rainfall as the year comes to a close. The city's winter months bring not only the heaviest downpours but also a remarkable shift in the atmospheric dynamic, making December a quintessentially rainy month in the Basque Country. The interplay of consistent rainfall and cooler temperatures fosters a lush landscape, setting the stage for the vibrant greenery that the region is renowned for.
As December arrives in San Sebastián, Spain, the city experiences a peak in humidity levels, reaching a notable 87%. This increase is part of a broader trend observed through the year, where winter months consistently showcase higher humidity compared to their summer counterparts. Following the cooler and more humid November, December's dampness adds to the crisp winter air, inviting residents and visitors alike to enjoy the city's enchanting atmosphere. Interestingly, while summer months like August and September see a dip to 76% and 75%, respectively, humidity begins to rise again towards the end of the year, highlighting San Sebastián's characteristic maritime climate. Overall, December encapsulates the higher moisture levels that contribute to the lush landscapes and vibrant life of this beautiful coastal city.
In San Sebastian, Spain, December marks a return to lower UV Index levels, with a reading of 2, categorizing exposure as low. This allows for extended outdoor enjoyment, with an increased burn time of 45 minutes before sun protection becomes necessary. Observing the trends throughout the year, we see a gradual rise in UV exposure peaking in the summer months, with values reaching a striking 10 in June and July. As the seasons shift from fall to winter, the UV Index notably declines, providing a gentle reminder to enjoy the sun responsibly during these cooler months. For more insights on UV exposure throughout the year, check out San Sebastian UV Index.
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In December, San Sebastian basks in a cozy embrace of 212 hours of sunshine, a charming close to the year that reflects a seasonal shift in light. As the festive spirit fills the air, this month marks a gentle decline from autumn’s 230 hours in November, yet still offers a delightful contrast to the year’s coldest season. The sun's presence steadily climbs from the year's start, peaking in the vibrant summer months; however, December’s milder rays remind us that the beauty of San Sebastian is eternal, captured perfectly between the warmth of the past and the promise of spring. Whether strolling along La Concha beach or savoring pinxtos in the Old Town, the December sunshine adds a special sparkle to this picturesque coastal gem.
In December, San Sebastian experiences a 34% chance of sunny weather, which, while not the highest, showcases a notable improvement compared to the preceding months—especially November, which plummets to just 17%. This trend indicates a slight resurgence of sunshine as the year wraps up, suggesting that while December days might still be somewhat overcast, there's a respectable opportunity to enjoy blue skies. Spring-like transitions start to emerge, hinting that while winter settles in, the sun is still inclined to make an appearance, inviting residents and visitors alike to embrace the holiday spirit with the occasional burst of warmth.
As December settles over San Sebastián, daylight hours reach their annual low, offering just 9 hours of sunlight. This tranquil winter month marks a shift from the lighter days of summer, where June boasts an impressive 15 hours of daylight. Following the peak of midsummer, daylight gradually dwindles through autumn, tapering down to 10 hours in October and then back to 9 hours in both November and December. Despite the shortness of daylight in winter, the gradual increase in light hours from January through May promises brighter days ahead, inviting residents and visitors alike to embrace the charm and beauty of this coastal city during the festive season.
As December unfolds in San Sebastián, the coastal city experiences a notable surge in wind speed, averaging 4.7 m/s (11 mph)—one of the highest rates of the year. This uptick in breezy conditions contrasts sharply with the gentle summer months, where July and August see winds drop to a mere 2.6 m/s (6 mph). The autumn months gradually usher in stronger gusts, signaling a transition as temperatures cool. By December, the sea air invigorates the landscape, with winds becoming a prominent feature, stirring up excitement and prompting locals and visitors alike to bundle up while enjoying the stunning coastal views. This seasonal shift not only enhances the city's charm but also enriches the vibrant atmosphere that San Sebastián is renowned for.
The weather in San Sebastian changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of December's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in San Sebastian and find detailed weather information for every month.
In December, the weather tends to be slightly milder with average temperatures reaching up to 9°C (49°F), while January sees a slight drop to an average of 7°C (45°F). Both months experience maximum temperatures that can reach up to 18°C (64°F) in December and 18°C (65°F) in January. December is notably wetter, with 217 mm (8.5 in) of precipitation over 17 days, compared to January’s 147 mm (5.8 in) over 14 days. Humidity remains fairly consistent, hovering around 87% in December and slightly lower at 86% in January. For a more detailed look at January's weather patterns, check out San Sebastian weather in January.
In comparing December and February, both months experience similar average temperatures of around 9°C (49°F), but February tends to be slightly warmer at its maximum, reaching up to 22°C (71°F) compared to December’s 18°C (64°F). Additionally, December is characterized by more precipitation, with 217 mm (8.5 in) over 17 days, while February sees less rain, totaling 130 mm (5.1 in) over 13 days. Humidity levels remain relatively high in both months, with December at 87% and February slightly lower at 85%. For a detailed look at February's weather patterns, visit San Sebastian weather in February.
In December, temperatures range from a chilly minimum of -1°C (31°F) to a maximum of 18°C (64°F), with an average of 9°C (49°F). The month experiences significant precipitation, totaling 217 mm (8.5 in) over 17 days, alongside relatively high humidity levels of 87%. In contrast, March sees a slight increase in average temperature to 10°C (51°F) with maximum highs reaching 22°C (71°F), while maintaining the same minimum of -1°C (30°F). Precipitation drops significantly to 124 mm (4.9 in), also spread over 17 days, and humidity sees a moderate decrease to 82%. To delve deeper into the weather specifics for March, you can visit San Sebastian weather in March.
In December, temperatures can drop to a chilling minimum of -1°C (31°F), with an average of 9°C (49°F) and a maximum of 18°C (64°F). The month is characterized by significant rainfall, totaling 217 mm (8.5 in) over 17 days, and a high humidity level of 87%. In contrast, April experiences milder weather, with temperatures ranging from a minimum of 1°C (34°F) to an average of 12°C (54°F) and a pleasant maximum of 23°C (74°F). Precipitation decreases to 108 mm (4.3 in) over 14 days, and humidity is slightly lower at 81%. Overall, April offers a more temperate and drier climate compared to the wetter, chillier December. For more details on the weather, check out San Sebastian weather in April.
December and May present contrasting weather patterns. In December, temperatures range from a chilly min of -1°C (31°F) to a mild max of 18°C (64°F), with an average of 9°C (49°F). The month experiences significant precipitation, totaling 217 mm (8.5 in) over 17 days, coupled with high humidity at 87%. In contrast, May boasts warmer temperatures, with a minimum of 4°C (39°F), an average of 14°C (58°F), and a peak of 27°C (80°F). Rainfall is notably lower at 120 mm (4.7 in) over the same number of days, and humidity decreases to 80%. For a more detailed view of May weather, check out San Sebastian weather in May.
December and June present contrasting weather patterns in San Sebastián. In December, temperatures range from a chilly -1°C (31°F) at night to a mild 18°C (64°F) during the day, with an average temperature of 9°C (49°F). The month is quite wet, with 217 mm (8.5 in) of precipitation over 17 days and high humidity at 87%. In contrast, June boasts much warmer temperatures, ranging from a minimum of 10°C (50°F) to a maximum of 32°C (90°F), with an average of 17°C (63°F). Although June is also wet, it sees significantly less rainfall, with 135 mm (5.3 in) over 15 days and lower humidity at 81%. For more details on June's weather, you can check San Sebastian weather in June.
December and July exhibit strikingly different weather patterns. In December, temperatures can drop to a minimum of -1°C (31°F) and rise to an average of 9°C (49°F), with a maximum of 18°C (64°F). The month is also marked by significant precipitation, totaling 217 mm (8.5 in) over 17 days, along with high humidity at 87%. In contrast, July boasts much milder temperatures, ranging from a minimum of 12°C (53°F) to an average of 19°C (67°F), with peaks reaching 33°C (91°F). The summer month sees relatively low precipitation at 93 mm (3.7 in) over 14 days and slightly lower humidity at 80%. For more detailed insights, you can check the San Sebastian weather in July.
December and August present strikingly different weather conditions. In December, temperatures can range from a chilly minimum of -1°C (31°F) to a mild maximum of 18°C (64°F), with an average of 9°C (49°F). The month is characterized by significant precipitation, totaling 217 mm (8.5 in), and high humidity at 87%, contributing to a damp and cool atmosphere. In contrast, August offers warmer temperatures, with a low of 12°C (53°F) and highs reaching up to 31°C (88°F), resulting in a pleasant average of 20°C (67°F). Rainfall is considerably lower at 95 mm (3.7 in) over 15 days, and humidity levels are also reduced to 76%, creating a more comfortable summer climate. For more details on the weather during this vibrant summer month, check out San Sebastian weather in August.
In December, the weather is notably cooler, with average temperatures ranging from a minimum of -1°C (31°F) to a maximum of 18°C (64°F), while September boasts milder temperatures, with a minimum of 9°C (48°F) and a maximum of 29°C (85°F). December is also characterized by higher humidity levels at 87% compared to 75% in September, contributing to a chillier atmosphere. Additionally, December experiences significantly more precipitation, with 217 mm (8.5 in) over 17 days, compared to only 97 mm (3.8 in) over 12 days in September. For more details on September weather, you can refer to San Sebastian weather in September.
When comparing the weather in December and October, it's evident that December tends to be much cooler and wetter. In December, temperatures range from a chilly -1°C (31°F) at night to a mild 18°C (64°F) during the day, with an average temperature of 9°C (49°F). In contrast, October features milder temperatures, with a minimum of 5°C (41°F), an average of 15°C (59°F), and a comfortable maximum of 26°C (79°F). Additionally, December sees higher precipitation levels, with 217 mm (8.5 in) expected over 17 days, compared to October's 135 mm (5.3 in) over just 14 days. Humidity levels are also higher in December at 87% compared to 81% in October. For more detailed insights, check out San Sebastian weather in October.
In comparing December and November weather, December tends to be cooler, with minimum temperatures dipping to -1°C (31°F) and an average of 9°C (49°F), while November maintains a warmer minimum of 2°C (36°F) and an average of 11°C (52°F). Additionally, December experiences more precipitation, totaling 217 mm (8.5 in) over 17 days, compared to November's 190 mm (7.5 in) over 18 days. Humidity levels are also slightly higher in December at 87%, as opposed to November's 85%. For more details about November weather in this region, you can refer to San Sebastian weather in November.
As December settles over San Sebastián, the weather transforms, offering a cooler yet intriguing experience compared to the milder months preceding it. With temperatures dipping to a refreshing average of 9°C, visitors can expect an atmosphere that is both brisk and invigorating. The city's high humidity of 87% combined with 217 mm of rainfall over 17 days brings a unique charm, creating a cozy ambiance typical of winter. This month stands apart, embracing the festive spirit against the backdrop of a typically rainy Basque landscape. For more insights on seasonal trends, explore San Sebastian Climate.