December Weather in Santa Barbara, Portugal

Last updated: February 24, 2025

Experience the charming December weather of Santa Barbara, Portugal, where the climate offers a delightful blend of mild temperatures and refreshing rainfall. With maximum temperatures reaching 20°C (68°F) and an average of 17°C (63°F), visitors can enjoy comfortable outdoor activities, while the cool minimum of 12°C (54°F) adds a cozy feel to the crisp evenings. Despite the 121 mm (4.8 in) of rainfall spread over 13 days, the high humidity at 85% lends a vibrant atmosphere, enhancing the lush landscape. Whether you're strolling through scenic vistas or savoring local delights, Santa Barbara’s December charm is sure to captivate.

December Temperature in Santa Barbara

In December, Santa Barbara, Portugal, experiences a mild transition into winter, with temperatures reflecting a steady coolness. The monthly minimum dips to around 12°C (54°F), while the average temperature lingers at a comfortable 17°C (63°F). Daytime highs can reach a pleasant 20°C (68°F), making it one of the milder months of the year. This notable warmth, especially compared to the chillier start of the winter season, invites both locals and travelers to enjoy outdoor activities, basking in the sun while donning light layers. Overall, December’s temperatures signify a blend of mild weather and inviting coastal charm, perfect for experiencing the beauty of Santa Barbara during the off-peak season.

December Weather in Santa Barbara: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Santa Barbara, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec615959596265697271686462
Data source: Temperature data for Santa Barbara generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Santa Barbara

December in Santa Barbara, Portugal, marks the culmination of a progressively wetter year, with precipitation reaching an average of 121 mm (4.8 in) over approximately 13 days. This month stands out not only for its increased rainfall but also for being the wettest of the year, reflecting a significant jump from November's 107 mm (4.2 in). The trend shows a clear seasonal shift, as the region transitions from the drier summer months—like July, which recorded just 22 mm (0.8 in)—to the more substantial winter rains. As nature prepares for the New Year, the higher precipitation in December fosters a thriving ecosystem, laying the groundwork for lush landscapes that the region is known for.

December Precipitation Trends in Santa Barbara

The chart displays monthly precipitation patterns in Santa Barbara, 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.
JanFebMarAprMayJunJulAugSepOctNovDec78774976544322474683107121
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Santa Barbara

In Santa Barbara, Portugal, December ushers in a notable 85% humidity, contributing to a tranquil, yet slightly damp atmosphere as the year draws to a close. This month stands out with a significant uptick compared to the preceding months, particularly from October's 79% and November's 80%. Humidity levels generally stabilize around the mid-eighty percent in the spring and summer, peaking in July at a steamy 86%. As the seasons transition, the gentle ebbing and flowing of moisture create a consistently humid environment, making December's rise a reminder of winter’s embrace. While humidity remains relatively high throughout the year, this December spike hints at the softer, more refreshing characteristics of the colder months in this coastal gem.

December Average Humidity in Santa Barbara

This chart illustrates the average monthly humidity levels in Santa Barbara, 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.
JanFebMarAprMayJunJulAugSepOctNovDec84%83%84%84%83%84%86%82%82%79%80%85%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Santa Barbara

In December, Santa Barbara, Portugal experiences a UV Index of 3, placing it in the moderate exposure category. This means that while the sun's rays can still cause harm, the risk of skin damage is lower, allowing for a safe burn time of about 30 minutes. Notably, the trends throughout the year reflect a gradual increase in UV intensity from January through June, peaking at an extreme 11 in June, before tapering down again in the later months. As the year winds down, December offers a reprieve from the harsher sunlight, making it a pleasant time for outdoor activities, all while encouraging sun safety practices. For detailed insights into UV levels throughout the year, visit Santa Barbara UV Index.

Maximum UV Index Levels in Santa Barbara for December

The chart shows the monthly maximum UV Index (UVI) for Santa Barbara 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.
JanFebMarAprMayJunJulAugSepOctNovDec3579101110109743
Data source: Santa Barbara 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 Santa Barbara

Amidst the serene charm of Santa Barbara, Portugal, December greets visitors with a gentle 194 hours of sunshine, inviting a tranquil escape as the year winds down. While this is a dip from the vibrant peaks of summer—where July dazzles with a remarkable 380 hours—December still offers a cozy glow, making it a lovely time to explore the region's picturesque landscapes. As the days grow shorter, the gradual decline in sunshine hours from November's 205 reflects the natural ebb of the season, yet the allure of Santa Barbara remains strong. Even in winter, this sun-kissed destination retains a warmth that captivates, encouraging leisurely strolls and the savoring of local delights under the soft winter sun.

Monthly Sunshine Duration in Santa Barbara: December Highlighted

The December sunshine duration represents the total number of hours Santa Barbara 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.
JanFebMarAprMayJunJulAugSepOctNovDec147h204h261h290h336h353h380h357h317h266h205h194h
Data source: Santa Barbara December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Santa Barbara During December

In Santa Barbara, Portugal, December boasts a 30% chance of sunny weather, marking a subtle increase from November's 26%. This period fits within a broader trend where the likelihood of sunshine rises from the early months of the year, with brighter prospects peaking in the summer. Although December might not see the sun as frequently as the sun-drenched summer months of July and August, which enjoy around 41% to 50% chances, the winter weather still offers a fair chance for sun-soaked days. As the year transitions, there's a steady ebb and flow of sunshine, promising a refreshing mix of cozy winter charms alongside welcoming glimpses of brightness in December.

Percentage of Sunny Days in December in Santa Barbara

The chart illustrates the percentage of sunny days in Santa Barbara 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 Santa Barbara experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec22%28%27%30%32%43%41%50%40%34%26%30%
Data source: Santa Barbara December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Santa Barbara in December

In Santa Barbara, Portugal, the rhythm of daylight paints a captivating scene throughout the year. As winter settles in, December brings a return to shorter days, with just 9 hours of sunlight, mirroring the brightness of January. This shift reveals a gentle decline from the vibrant 14 hours of daylight that graced the peak summer months of June, July, and August. Following the warmth of spring, where daylight stretched to 13 hours in April, the transition into autumn sees a gradual tapering, highlighted by 12 hours in September and 10 hours in November. The year is a journey through sunlight, with each month inviting its own unique charm, ultimately culminating in the serene, quieter days of winter.

Average Daylight Hours in Santa Barbara for December

The chart illustrates the variation in daylight duration in Santa Barbara throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 47m10h 45m11h 58m13h 13m14h 17m14h 48m14h 32m13h 35m12h 23m11h 8m10h 3m9h 29m
Data source: Santa Barbara daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Santa Barbara

As the year comes to a close, December in Santa Barbara, Portugal, ushers in a noticeable uptick in wind activity with an average wind speed of 8.9 m/s (20 mph). This marks a shift from the calmer summer months, where wind speeds dip to lows of around 4.8 m/s (11 mph) in June. Although December's breezes are less intense than the peak winds of January (10.4 m/s) and February (11.1 m/s), they still contribute to a refreshing coastal atmosphere. Following a relative lull in spring, the winds pick up again into the fall, hinting at nature’s rhythm in this beautiful seaside locale. As winter settles in, the invigorating winds of December invite both locals and visitors to embrace the season's charm.

Average December Wind Speed in Santa Barbara

The chart displays monthly wind speed patterns in Santa Barbara, 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.
JanFebMarAprMayJunJulAugSepOctNovDec10.411.16.68.06.64.86.36.16.26.68.48.9 m/s
Data source: Santa Barbara December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Santa Barbara Compares to Other Months

The weather in Santa Barbara 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 Santa Barbara and find detailed weather information for every month.

December and January weather in Santa Barbara exhibits a similar mild climate, albeit with some notable differences. In December, temperatures range from a minimum of 12°C (54°F) to a maximum of 20°C (68°F), with an average of 17°C (63°F). This month also sees higher precipitation, with 121 mm (4.8 in) across 13 days and a humidity level of 85%. In contrast, January experiences slightly cooler temperatures, with a minimum of 11°C (52°F) and a maximum of 19°C (66°F), resulting in an average of 16°C (61°F). Notably, precipitation decreases to 78 mm (3.1 in) over 11 days, with humidity remaining fairly consistent at 84%. For more detailed information about January weather, you can check Santa Barbara weather in January.

In December, the weather is generally milder and wetter, with average temperatures ranging from a minimum of 12°C (54°F) to a maximum of 20°C (68°F). This month typically sees higher precipitation levels, averaging 121 mm (4.8 in) over 13 days, along with a relatively high humidity of 85%. In contrast, February experiences slightly cooler temperatures, with an average ranging from a minimum of 10°C (51°F) to a maximum of 18°C (65°F). Additionally, rainfall decreases to 77 mm (3.0 in), also spread over 13 days, and humidity is marginally lower at 83%. For more detailed insights on the weather in February, you can visit Santa Barbara weather in February.

When comparing the weather in December and March, we see some noteworthy differences. December tends to be slightly warmer, with average temperatures ranging from a minimum of 12°C (54°F) to a maximum of 20°C (68°F), while March boasts lower average temperatures, with a minimum of 10°C (50°F) and a maximum of 18°C (64°F). Additionally, December experiences significantly more rainfall, totaling 121 mm (4.8 in) over 13 days, compared to March's 49 mm (1.9 in) across 9 days. Humidity levels remain fairly similar in both months, with December at 85% and March at 84%. For those interested in a detailed look at March weather, you can visit Santa Barbara weather in March.

In December, the weather tends to be slightly warmer with average temperatures ranging from a minimum of 12°C (54°F) to a maximum of 20°C (68°F), while April sees a slightly cooler range with a minimum of 10°C (51°F) and a maximum of 18°C (64°F). Precipitation levels are notably higher in December, totaling 121 mm (4.8 in) over 13 days, compared to April's 76 mm (3.0 in) over the same number of days. Humidity levels are fairly similar, with December at 85% and April at 84%, creating a consistently moist climate during both months. For more detailed weather information, check out Santa Barbara weather in April.

In December, the weather is generally mild, with temperatures ranging from a minimum of 12°C (54°F) to a maximum of 20°C (68°F), and an average of 17°C (63°F). The month is relatively wet, with 121 mm (4.8 in) of precipitation over 13 days, alongside a high humidity level of 85%. In contrast, May sees slightly cooler temperatures, with a minimum of 12°C (53°F) and a maximum of 19°C (67°F), resulting in an average temperature of 16°C (62°F). Rainfall is significantly reduced to 54 mm (2.1 in) over just 8 days, with the humidity slightly lower at 83%. For more insights on weather patterns, check out Santa Barbara weather in May.

In December, the weather is generally cooler with minimum temperatures around 12°C (54°F) and daily averages of 17°C (63°F), reaching up to 20°C (68°F). This month is also marked by higher precipitation, averaging 121 mm (4.8 in) over 13 days, and a humidity level of 85%. In contrast, June sees slightly warmer temperatures, with minimums at 15°C (58°F) and averages of 19°C (66°F) that peak at 22°C (72°F). Precipitation drops significantly to 43 mm (1.7 in) over just 6 days, and humidity remains relatively high at 84%. For those interested in experiencing the delightful weather, check out Santa Barbara weather in June.

In December, the weather tends to be cooler with average temperatures ranging from a minimum of 12°C (54°F) to a maximum of 20°C (68°F). The month also experiences significant precipitation, averaging 121 mm (4.8 in) over about 13 days, coupled with high humidity levels at 85%. In contrast, July enjoys warmer temperatures with averages between 18°C (65°F) and 23°C (74°F), and remarkably lower rainfall of just 22 mm (0.8 in) spread over only 3 days. The humidity remains relatively high at 86%, but the overall experience in July is drier and sunnier. For more details, check out Santa Barbara weather in July.

December and August showcase distinct weather patterns in terms of temperature and precipitation. In December, temperatures range from a minimum of 12°C (54°F) to a maximum of 20°C (68°F), with an average of 17°C (63°F). This month also sees considerable rainfall, with 121 mm (4.8 in) spread over 13 days and a high humidity level of 85%. In contrast, August presents warmer conditions, with temperatures varying from a minimum of 19°C (66°F) to a maximum of 24°C (76°F) and an average of 22°C (72°F). Precipitation in August is less frequent, totaling 47 mm (1.9 in) over just 8 days, and the humidity is slightly lower at 82%. For more details, you can check Santa Barbara weather in August.

In December, the temperatures in Santa Barbara range from a minimum of 12°C (54°F) to a maximum of 20°C (68°F), with an average temperature of around 17°C (63°F). This month also sees a significant increase in precipitation, totaling 121 mm (4.8 in) over approximately 13 rainy days, coupled with high humidity levels at 85%. In contrast, September offers warmer weather with temperatures ranging from a minimum of 19°C (66°F) to a maximum of 24°C (76°F) and an average of 22°C (71°F). The precipitation in September is much lower, at just 45 mm (1.8 in) over 10 days, along with slightly lower humidity at 82%. For more details, you can visit Santa Barbara weather in September.

In December, the weather is generally cooler than in October, with average temperatures ranging from a minimum of 12°C (54°F) to a maximum of 20°C (68°F). In contrast, October enjoys milder temperatures, with a range from 15°C (58°F) to 24°C (76°F). Additionally, December experiences more rainfall, with 121 mm (4.8 in) over 13 days, compared to October's 83 mm (3.3 in) over 12 days. Humidity levels are also higher in December at 85%, compared to 79% in October. For more detailed insights into October weather, you can check Santa Barbara weather in October.

In December, the weather slightly cools down compared to November, with minimum temperatures averaging 12°C (54°F) and maximums reaching 20°C (68°F), while November features a higher minimum of 13°C (55°F) and maximums up to 22°C (71°F). Precipitation also increases in December, totaling 121 mm (4.8 in) over 13 days, compared to November’s 107 mm (4.2 in) spread over 14 days. Humidity levels rise marginally in December to 85%, compared to 80% in November. For a closer look at the weather in November, you can visit Santa Barbara weather in November.

Compare Santa Barbara's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Santa Barbara

As December unfolds in Santa Barbara, the coastal charm transforms with cooler temperatures and increased rainfall, marking a distinct shift from the drier, warmer months of the year. Unlike the sun-soaked summer, December experiences higher humidity levels and frequent precipitation, averaging about 13 wet days. The temperature settles into a mild range, providing a refreshing contrast to the heat of prior months. This blend of cooler air and potential rain not only invigorates the landscape but also invites visitors to enjoy a different side of Santa Barbara’s stunning scenery. For a comprehensive overview of what to expect, check out Santa Barbara Climate.