December Weather in Bilbao, Spain

Last updated: February 6, 2025

In Bilbao, Spain, the weather in December presents a dynamic, yet cool climate. With maximum temperatures reaching up to 19°C (66°F), the average hovers around a crisp 10°C (50°F), while chilly nights can plunge to a minimum of 2°C (36°F). This month is marked by considerable precipitation, totaling 154 mm (6.1 in), and rain is likely on 17 days, contributing to the region's lush greenery. High humidity levels, averaging at 85%, create a damp atmosphere, making December a month of both beauty and briskness in this vibrant Basque city.

December Temperature in Bilbao

In December, Bilbao's temperatures exhibit a gentle shift as winter settles in, with minimums averaging around 2°C (36°F) and peaks close to 19°C (66°F). This reflects a noticeable contrast to the milder conditions earlier in the year, where both maximum and average temperatures were considerably higher. The average temperature hovers at a comfortable 10°C (50°F), making December a time where the city flaunts its cool, crisp air, inviting locals and visitors alike to enjoy cozy indoor activities and charming festive events. As the month progresses, the gradual dip in temperatures signals a transition into the heart of winter, yet Bilbao's vibrant atmosphere remains warm and welcoming, perfect for exploring its rich culture against a backdrop of seasonal change.

December Weather in Bilbao: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Bilbao, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec465051545863666764595350
Data source: Temperature data for Bilbao generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Bilbao

In December, Bilbao experiences a notable surge in precipitation, with 154 mm (6.1 in) of rainfall over 17 days. This marks a decrease from November's substantial 158 mm (6.2 in), despite similarly high rainfall days. The trend of increased moisture continues from autumn into winter, as December's average rainfall mirrors the heavier months like January and February in their damp conditions. This period showcases Bilbao's characteristic wet climate, contributing to the lush scenery that defines the region while also inviting a chilly, cozy atmosphere perfect for enjoying the city's vibrant indoor culture.

December Precipitation Trends in Bilbao

The chart displays monthly precipitation patterns in Bilbao, with values for each month alongside December's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec117103989282104656281105158154
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Bilbao

December in Bilbao brings a return to a higher humidity level, with averages rising to 85%. This increase is part of a broader trend observed throughout the year, where humidity consistently hovers in the mid-80s during the winter months, peaking in July at 87%. As the year progresses from September's more comfortable 77%, humidity levels gradually climb, reflecting the region's characteristic dampness. While December maintains a December’s chill in the air, the slight uptick suggests a persistent maritime influence, making it a quintessential winter month in this vibrant city. Despite these fluctuations, Bilbao’s overall humidity remains a defining feature of its temperate climate.

December Average Humidity in Bilbao

This chart illustrates the average monthly humidity levels in Bilbao, with December's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how December's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec85%83%82%81%81%83%87%82%77%80%83%85%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Bilbao

In December, the UV Index in Bilbao, Spain, drops back to a low level of 2, with a burn time of 45 minutes. This trend marks a significant decrease in UV exposure compared to the summer months, where indices soared to 10. As winter settles in, residents and visitors can enjoy outdoor activities with less concern for sunburn, thanks to the more forgiving sun. This pattern of fluctuating UV levels throughout the year highlights the importance of adjusting sun protection strategies seasonally. For a detailed look at monthly UV trends, visit Bilbao UV Index.

Maximum UV Index Levels in Bilbao for December

The chart shows the monthly maximum UV Index (UVI) for Bilbao in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec24679101097532
Data source: Bilbao December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

December Sunshine in Bilbao

As December arrives in Bilbao, Spain, the city experiences a gentle decline in sunshine hours, with about 226 hours illuminating the month. This slight dip follows a high point in the sun-soaked summer months of June and July, where daylight peaked at 376 and 400 hours, respectively. The transition into winter brings shorter days, yet Bilbao retains a moderate charm with consistent sunlight as it enters the cooler season. While December's sunlight is less than the vibrant days of May and August, it offers a cozy ambiance perfect for exploring the city's unique architecture and rich culture, making it a delightful destination even in the midst of winter.

Monthly Sunshine Duration in Bilbao: December Highlighted

The December sunshine duration represents the total number of hours Bilbao experiences direct sunlight during the month of December, excluding cloudy or obstructed periods. This chart compares the sunshine duration of December with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec172h241h313h332h375h376h400h381h332h293h232h226h
Data source: Bilbao December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Bilbao During December

In December, Bilbao enjoys a notable chance of sunny weather, with 39% likelihood of sunshine—a promising statistic compared to the preceding months. This increase in sunlit days towards the year's end suggests a shift from the lower probabilities seen in November, which dipped to just 18%. Analyzing the broader trends, it’s evident that as winter approaches, Bilbao experiences a fluctuating pattern of sunshine, with December surpassing even some summer months like May and August. This makes December a surprising contender for those seeking a touch of sun in the otherwise chilly Basque winter, offering a delightful respite from the usual gloom of late autumn.

Percentage of Sunny Days in December in Bilbao

The chart illustrates the percentage of sunny days in Bilbao throughout the year, with December highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Bilbao experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec23%22%40%34%28%32%37%37%27%36%18%39%
Data source: Bilbao December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Bilbao in December

In December, daylight in Bilbao, Spain, is a mere 9 hours, mirroring the shorter days of January and November. This time of year marks the culmination of a gradual decline in daylight that begins in late summer as the days shorten from a peak of 15 hours in June. While winter casts its shadow over the city, the rhythm of daylight hints at an impending shift; from December onward, the daylight will begin its ascent, promising longer and brighter days as spring approaches. This seasonal ebb and flow paints a captivating picture of Bilbao's natural light cycle, inviting both reflection and anticipation for the brighter days ahead.

Average Daylight Hours in Bilbao for December

The chart illustrates the variation in daylight duration in Bilbao throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 21m10h 30m11h 57m13h 26m14h 41m15h 19m14h 59m13h 52m12h 27m10h 58m9h 40m9h
Data source: Bilbao daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Bilbao

As the year draws to a close, December in Bilbao ushers in a notable shift in wind patterns, boasting an average wind speed of 4.6 m/s (10 mph). This is a striking increase compared to the gentle breezes of the warmer months, which lingered around 2.4 to 2.8 m/s. The transition reveals a distinct trend: as winter approaches, the city experiences a resurgence in wind intensity, contrasted with the calmer conditions of late spring and summer. Interestingly, December's winds rival those of November, which caps the year off with a refreshing, brisk ambiance, reminding residents and visitors alike of the dynamic climate that characterizes this beautiful Basque region.

Average December Wind Speed in Bilbao

The chart displays monthly wind speed patterns in Bilbao, with values for each month shown alongside December's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how December's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec3.84.33.43.22.82.82.62.42.62.93.84.6 m/s
Data source: Bilbao December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Bilbao Compares to Other Months

The weather in Bilbao 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 Bilbao and find detailed weather information for every month.

In December, temperatures in Bilbao range from a minimum of 2°C (36°F) to a maximum of 19°C (66°F), with an average temperature of 10°C (50°F). The month is characterized by significant precipitation, totaling 154 mm (6.1 in) over 17 days, and humidity levels remain high at 85%. In contrast, January sees a slight dip in temperatures, with minimums dropping to -1°C (30°F) while the maximum remains the same at 19°C (66°F). The average temperature decreases to 8°C (46°F), and precipitation also lessens to 117 mm (4.6 in) over 13 days. Notably, the humidity stays consistent at 85%. For more details on January conditions, check out Bilbao weather in January.

December and February in Bilbao offer contrasting weather experiences, despite both months averaging around 10°C (50°F). December sees milder temperatures with a minimum of 2°C (36°F) and a maximum reaching 19°C (66°F), but it also brings significant rainfall, with 154 mm (6.1 in) over 17 days and high humidity at 85%. In contrast, February has cooler nights with a minimum of -2°C (30°F) and slightly warmer days, peaking at 22°C (72°F). This month experiences less overall precipitation, totaling 103 mm (4.0 in) over just 13 days, and a slightly lower humidity of 83%. For more details about February weather, you can check Bilbao weather in February.

December and March present distinct weather patterns. In December, temperatures range from a minimum of 2°C to a maximum of 19°C, with an average of 10°C. This month experiences higher precipitation, with 154 mm over 17 days and humidity levels at 85%. In contrast, March offers a cooler climate with minimum temperatures dipping to -1°C and maximums reaching 21°C, while maintaining an average of 10°C. Precipitation decreases significantly to 98 mm over the same number of rainy days, and humidity is slightly lower at 82%. For more detailed insights on March weather, check out Bilbao weather in March.

In comparing December and April weather, December typically presents cooler temperatures, with averages hovering around 10°C (50°F) and a maximum of 19°C (66°F), while April sees a slightly warmer average of 12°C (54°F) and can peak at 23°C (74°F). Precipitation is more pronounced in December, totaling 154 mm (6.1 in) over 17 days, compared to April's 92 mm (3.6 in) over 15 days. Humidity levels also differ slightly, with December at 85% and April at 81%, reflecting the transition from winter to spring. For a more detailed look at how the weather evolves, check out Bilbao weather in April.

In December, the weather features milder temperatures, with daily averages around 10°C (50°F) and maximums reaching up to 19°C (66°F). However, it is noticeably wetter, with 154 mm (6.1 in) of precipitation over 17 days and high humidity at 85%. In contrast, May brings warmer temperatures with minimums of 5°C (41°F) and average highs of 26°C (80°F). The month sees significantly less rain, accumulating only 82 mm (3.2 in) over 15 days, and slightly lower humidity at 81%. For more detailed information, you can check Bilbao weather in May.

The weather in December contrasts sharply with June in terms of temperature and precipitation. In December, temperatures range from a chilly 2°C (36°F) at night to a comfortable 19°C (66°F) during the day, with an average of 10°C (50°F). The month is characterized by higher humidity at 85% and receives considerable rainfall, totaling 154 mm (6.1 in) over 17 days.

In contrast, June welcomes warmer temperatures, with nighttime lows of 9°C (48°F) and daytime highs reaching up to 32°C (89°F), averaging around 17°C (63°F). The humidity drops slightly to 83%, and precipitation is lower at 103 mm (4.1 in) over 14 days, making it a more pleasant month overall. For a detailed look at what you can expect, check out Bilbao weather in June.

December and July present contrasting weather conditions. In December, temperatures range from a chilly minimum of 2°C (36°F) to a mild average of 10°C (50°F), peaking at 19°C (66°F). The month sees considerable precipitation, totaling 154 mm (6.1 in) over approximately 17 days, paired with high humidity averaging around 85%. In contrast, July boasts warmer temperatures with a minimum of 11°C (53°F) and an average of 19°C (67°F), soaring to a maximum of 33°C (91°F). Precipitation is significantly lower in July, with only 65 mm (2.6 in) spread over about 12 days, and humidity remains similarly high at 87%. For more details on July's climate, visit Bilbao weather in July.

December and August present strikingly different weather patterns. In December, temperatures range from a chilly minimum of 2°C (36°F) to a comfortable average of 10°C (50°F), with a maximum of 19°C (66°F). The month is characterized by higher precipitation, receiving 154 mm (6.1 in) over 17 days, and the humidity is elevated at 85%. In contrast, August boasts much warmer conditions, with minimum temperatures starting at 12°C (54°F) and averaging around 20°C (67°F), reaching up to a hot 33°C (93°F). It experiences significantly less rainfall, totaling 62 mm (2.5 in) across 12 days, and the humidity is slightly lower at 82%. For more detailed insights on August weather, you can check Bilbao weather in August.

When comparing the weather between December and September, it's clear that September enjoys milder temperatures, with average highs reaching up to 30°C (86°F) compared to December's maximum of 19°C (66°F). Additionally, September tends to be drier, receiving only 81 mm (3.2 in) of precipitation over 12 days, whereas December sees a significantly wetter month with 154 mm (6.1 in) across 17 days. Humidity levels are also somewhat lower in September at 77%, while December experiences a more humid atmosphere at 85%. For more detailed insights into September weather, you can check Bilbao weather in September.

In comparing the weather of December and October, December tends to be noticeably cooler with average temperatures ranging from a low of 2°C (36°F) to a high of 19°C (66°F), while October enjoys milder temperatures that span from 5°C (41°F) to a warm 27°C (81°F). Additionally, December experiences more precipitation, receiving about 154 mm (6.1 in) over 17 days, compared to October's 105 mm (4.1 in) across 13 days. Humidity levels are slightly higher in December, averaging 85%, compared to October’s 80%. For more detailed information, you can check Bilbao weather in October.

In comparing the weather between November and December, we see that December generally experiences slightly cooler temperatures, with a minimum of 2°C (36°F) and an average of 10°C (50°F), compared to November's warmer minimum of 4°C (39°F) and average of 11°C (53°F). The maximum temperature in December reaches 19°C (66°F), which is lower than November's peak of 22°C (72°F). Precipitation levels remain fairly consistent, with December receiving 154 mm (6.1 in) over 17 days, just slightly less than November's 158 mm (6.2 in) over 18 days. Humidity is slightly higher in December at 85%, compared to November's 83%. For a more detailed look at November weather, you can check Bilbao weather in November.

Compare Bilbao's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Bilbao

As winter settles in, December in Bilbao brings a distinct shift in weather patterns, characterized by a cooler atmosphere compared to the milder months before. With an average temperature of 10°C (50°F), chilly breezes often accompany the season’s higher humidity levels, creating a somewhat damp experience. Rainfall is frequent, with precipitation occurring on 17 days, adding to the city's vibrant landscape, while temperatures can occasionally reach a maximum of 19°C (66°F). December's weather is a reminder that while Bilbao remains beautiful year-round, this month ushers in a cozy charm that invites visitors to explore indoor attractions and enjoy the city's warm culinary delights. For more information on the city's climate throughout the year, check out the detailed guide on Bilbao Climate.