December Weather in Alvor, Portugal

Last updated: February 24, 2025

In December, Alvor, Portugal offers a mild climate characterized by a maximum temperature of 22°C (71°F) and an average of 12°C (54°F), making it a pleasant winter escape. Visitors can expect cooler nights, with temperatures dipping to a minimum of 0°C (33°F). While the month sees about 45 mm (1.8 in) of precipitation over six days, the humidity level remains relatively high at 81%, contributing to a fresh coastal atmosphere. This combination of mild temperatures and occasional rainfall creates an inviting environment for exploring Alvor's quaint streets and stunning scenery.

December Temperature in Alvor

In December, Alvor, Portugal, offers a cool yet comfortable climate as it transitions into winter. With temperatures ranging from a chilly 0°C (33°F) at night to a pleasant 22°C (71°F) during the day, visitors can enjoy mild afternoons amidst the backdrop of the picturesque coastal town. The average temperature settles around 12°C (54°F), hinting at a soothing warmth compared to the harsher winters found elsewhere. This month marks the end of a progressive drop in temperatures, transitioning from the warmer autumn months, where averages hovered at 14°C (58°F) in November. December's relatively mild winter weather makes it an ideal time for leisurely strolls along the stunning beaches, while still allowing for cozy evenings by the fire.

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

The chart illustrates December temperature patterns in Alvor, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec505456596669737572665854
Data source: Temperature data for Alvor 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 Alvor

In December, Alvor experiences a moderate increase in precipitation, measuring 45 mm (1.8 in), which is slightly lower than November but indicative of the transitioning winter months. With about 6 days of rain, December's wet weather indicates a gradual shift from the drier summer months, where rainfall drops to as low as 1 mm in August. This pattern suggests that while the year winds down, Alvor prepares for the heavier rains of spring, providing a refreshing contrast to the seasonal dryness. As the festive season unfolds, residents can expect overcast skies punctuated by intermittent showers, ideal for cozying up in local cafés and enjoying the charm of this coastal town.

December Precipitation Trends in Alvor

The chart displays monthly precipitation patterns in Alvor, 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.
JanFebMarAprMayJunJulAugSepOctNovDec24447865238318325045
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Alvor

As December rolls into Alvor, Portugal, residents and visitors experience a notable increase in humidity, peaking at 81%. This elevates the moisture levels from the previous month, which saw a humidity of 78% in November. Throughout the year, humidity tends to fluctuate, beginning at a high of 80% in January before gradually decreasing to its lowest point of 67% in June. Interestingly, after June, humidity begins to rise again, peaking once more in December. This trend highlights the region's shift towards a more humid winter, providing a cozy atmosphere amidst the beautiful coastal scenery.

December Average Humidity in Alvor

This chart illustrates the average monthly humidity levels in Alvor, 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.
JanFebMarAprMayJunJulAugSepOctNovDec80%74%71%69%69%67%69%68%71%75%78%81%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Alvor

In Alvor, Portugal, the December UV Index reflects a return to a moderate exposure level, with a UV Index of 3 and an associated burn time of 30 minutes. This marks a noticeable decline from the peak UV Index readings observed from April to August, where levels surged to a maximum of 11 during June and consistently hovered around 10 in the height of summer. As the year winds down, daylight may lessen, but cautious sun protection remains important, especially during those rare sunny spells. This pattern of fluctuating UV levels highlights the importance of sun safety year-round, even in winter months. For more detailed insights, visit our Alvor UV Index.

Maximum UV Index Levels in Alvor for December

The chart shows the monthly maximum UV Index (UVI) for Alvor 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: Alvor 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 Alvor

December in Alvor, Portugal, offers a delightful ambiance with 244 hours of sunshine, making it a charming time to visit as the year draws to a close. While the hours of sunlight decrease from the radiant peak in July, which boasts 425 hours, December still shines brightly compared to the winter sun in many other regions. As the days transition from the longer, sun-drenched months of summer to the crispness of winter, the overall trend reveals a gradual decline in sunlight, yet December's sunshine provides a serene backdrop perfect for leisurely strolls and coastal exploration. With its mild climate and beautiful landscapes, Alvor beckons those seeking a warm retreat during the festive season.

Monthly Sunshine Duration in Alvor: December Highlighted

The December sunshine duration represents the total number of hours Alvor 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.
JanFebMarAprMayJunJulAugSepOctNovDec202h248h308h359h410h412h425h397h351h323h249h244h
Data source: Alvor December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Alvor During December

In December, Alvor, Portugal, greets visitors with a 44% chance of sunny weather, setting a tone of mild winter charm. This probability mirrors the cool, transitional months of January and November, both presenting similar levels of sunshine. As we move into the winter season, the likelihood of sun begins to drop from the autumn highs of 72% in November to the more muted December figures. However, compared to the depths of winter experienced elsewhere, December in Alvor still offers a balanced blend of cloudy days and sunshine, perfect for those seeking to escape harsher winters. While not the sunniest month, December maintains the region’s overall appeal, highlighting Alvor’s consistent allure for sun-seekers year-round.

Percentage of Sunny Days in December in Alvor

The chart illustrates the percentage of sunny days in Alvor 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 Alvor experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec44%23%59%38%65%76%87%84%65%58%72%44%
Data source: Alvor December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Alvor in December

In Alvor, Portugal, the daylight duration experiences a rhythmic cycle throughout the year, peaking in the lush months before summer and gradually diminishing as winter approaches. By December, the days shrink to about 9 hours of daylight, mirroring the conditions seen in January. This gradual decline begins in November at 10 hours and marks the start of the winter season, where the sun sets earlier, casting longer evenings. As the calendar inches toward the brighter days of spring, daylight starts at 11 hours in March, gradually increasing to a robust 14 hours during the height of summer. This natural ebb and flow creates a captivating experience of light and dark, embodying the charm of each passing season in Alvor.

Average Daylight Hours in Alvor for December

The chart illustrates the variation in daylight duration in Alvor throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 55m10h 49m11h 58m13h 9m14h 9m14h 39m14h 23m13h 30m12h 22m11h 11m10h 9m9h 38m
Data source: Alvor daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Alvor

As December settles in Alvor, Portugal, the average wind speed picks up to 4.1 m/s (9 mph), hinting at the invigorating breezes of late autumn. This increase, notable compared to the quieter months of September and October, aligns with a seasonal trend where wind speeds fluctuate slightly but often peak during the summer months. July captures the highest gusts at 4.3 m/s (10 mph), while the remainder of the year tends to hover in the calm range of 3.2 to 4.1 m/s. December's refreshing winds not only highlight the unique character of winter along the Algarve coast but also beckon visitors to embrace the crisp seaside air, perfect for exploring the charming coastal town.

Average December Wind Speed in Alvor

The chart displays monthly wind speed patterns in Alvor, 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.
JanFebMarAprMayJunJulAugSepOctNovDec3.53.93.43.24.13.94.33.73.23.23.34.1 m/s
Data source: Alvor December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Alvor Compares to Other Months

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

December and January present a notable shift in weather patterns. In December, temperatures range from a minimum of 0°C (33°F) to a maximum of 22°C (71°F), with an average of 12°C (54°F). The month sees roughly 45 mm (1.8 in) of precipitation over about 6 days, coupled with a high humidity level of 81%. In contrast, January experiences slightly cooler temperatures, with a minimum of -2°C (29°F) and an average of 10°C (51°F), reaching a maximum of 21°C (70°F). Precipitation decreases significantly to 24 mm (0.9 in) over just 3 days, while humidity remains relatively stable at 80%. For more detailed insights about the weather in January, visit Alvor weather in January.

December and February present mild weather conditions, but there are notable differences between the two months. In December, temperatures range from a minimum of 0°C (33°F) to a maximum of 22°C (71°F), with an average temperature of 12°C (54°F). The month experiences around 45 mm (1.8 in) of precipitation over approximately six days, combined with a humidity level of 81%. Conversely, February sees slightly warmer temperatures, with a minimum of 1°C (34°F), a maximum of 24°C (76°F), and an average of 12°C (55°F). Precipitation is similar at 44 mm (1.7 in) but occurs over just five days, resulting in a lower humidity of 73%. For more detailed information, check out Alvor weather in February.

In December, the weather typically features cooler temperatures, with a minimum of 0°C (33°F) and an average of 12°C (54°F), peaking at 22°C (71°F). There's relatively low precipitation, totaling 45 mm (1.8 in) over about 6 days, accompanied by high humidity at 81%.

In contrast, March sees a slight increase in temperatures, ranging from a minimum of 3°C (38°F) to an average of 14°C (57°F), and reaching a maximum of 27°C (81°F). However, it also experiences more rainfall, amounting to 78 mm (3.1 in) over 9 days, though humidity drops to 71%.

For more detailed information about the weather in March, check out Alvor weather in March.

December and April present distinct weather patterns, showcasing the transition from winter to spring. In December, temperatures range from a minimum of 0°C (33°F) to a maximum of 22°C (71°F), with an average of 12°C (54°F), accompanied by relatively high humidity at 81%. The month sees about 45 mm (1.8 in) of precipitation over six days. In contrast, April enjoys milder temperatures that vary from a minimum of 6°C (44°F) to a maximum of 29°C (84°F), averaging 15°C (60°F). While it experiences greater total precipitation of 65 mm (2.5 in) over 11 days, the humidity is lower at 69%. These differences make April notably warmer and slightly wetter compared to December. For a more detailed look at April weather in Alvor, check out Alvor weather in April.

In December, the weather is typically cooler, with temperatures ranging from a minimum of 0°C (33°F) to a maximum of 22°C (71°F) and an average of 12°C (54°F). This month also sees a higher humidity level of 81% and about 45 mm (1.8 in) of precipitation spread over six days. In contrast, May brings significantly warmer conditions, with temperatures starting at a minimum of 7°C (45°F) and reaching up to 34°C (93°F), averaging around 19°C (66°F). The precipitation decreases to just 23 mm (0.9 in), occurring on only four days, and humidity also drops to 69%. For more insights into May weather, you can explore Alvor weather in May.

December and June present contrasting weather conditions, highlighting the seasonal shifts. In December, temperatures range from a chilly 0°C (33°F) to a mild 22°C (71°F), with an average of 12°C (54°F). The month typically experiences 45 mm (1.8 in) of precipitation over six days and high humidity at 81%, creating a damp atmosphere. In contrast, June showcases a much warmer climate, with temperatures varying from a comfortable 11°C (52°F) to a scorching 40°C (105°F), averaging 21°C (69°F). The precipitation drops significantly to just 8 mm (0.3 in) across three days, and humidity decreases to 67%, resulting in a drier feel. For more details on June weather, visit Alvor weather in June.

December and July present stark contrasts in weather conditions. In December, temperatures range from a chilly minimum of 0°C (33°F) to a comfortable maximum of 22°C (71°F), with an average of 12°C (54°F). This month sees an average of 45 mm (1.8 in) of precipitation spread over about 6 days, contributing to a high humidity level of 81%. In sharp contrast, July features much warmer temperatures, with a minimum of 12°C (55°F) and a scorching maximum of 39°C (103°F), averaging around 23°C (74°F). Rain is scarce in July, with only about 3 mm (0.1 in) of precipitation falling on just 1 day, and humidity drops to 69%. For more details about the warm weather, you can check out Alvor weather in July.

December and August showcase stark contrasts in weather conditions. In December, temperatures range from a chilly minimum of 0°C (33°F) to a comfortable average of 12°C (54°F), with occasional highs reaching 22°C (71°F). The month is characterized by significant humidity at 81%, leading to about 45 mm (1.8 in) of precipitation over six days. In contrast, August experiences much warmer temperatures, with a minimum of 14°C (57°F) and an average of 24°C (75°F), soaring up to a high of 43°C (110°F). The humidity is notably lower at 68%, and the month is typically dry, receiving barely 1 mm (0.0 in) of precipitation across zero days. For those interested in detailed weather patterns, you can find more information here: Alvor weather in August.

In December, the weather is significantly cooler compared to September, with average temperatures ranging from a minimum of 0°C (33°F) to a maximum of 22°C (71°F). In contrast, September boasts much warmer conditions, with temperatures averaging between 11°C (52°F) and 37°C (98°F). Additionally, December experiences higher humidity levels at 81%, while September is relatively drier with a humidity of 71%. Precipitation is also more frequent in December, averaging 45 mm over six days, compared to just 8 mm on one day in September. For more details on September weather, you can check out Alvor weather in September.

When comparing the weather in December and October, several key differences emerge. October typically experiences warmer temperatures, with a minimum of 8°C (46°F) and an average of 19°C (67°F), peaking at a high of 34°C (93°F). In contrast, December sees cooler conditions, with a minimum of 0°C (33°F) and an average of 12°C (54°F), reaching a maximum of 22°C (71°F). Precipitation also varies, as October has 32 mm (1.2 in) over 4 days, whereas December receives more rain, totaling 45 mm (1.8 in) over 6 days. Additionally, humidity levels are slightly higher in December at 81%, compared to October's 75%. For more details on October's weather, visit Alvor weather in October.

In comparing the weather between December and November, we observe a noticeable drop in temperatures in December, with minimums reaching 0°C (33°F) compared to November's milder minimum of 4°C (40°F). The average temperature also decreases slightly, from 14°C (58°F) in November to 12°C (54°F) in December. Despite these cooler temperatures, December records close to the same level of precipitation, with 45 mm (1.8 in) over 6 days, just slightly less than November's 49 mm (1.9 in) over 7 days. Humidity rises slightly in December, averaging 81% compared to November's 78%. For a detailed look at November's weather in Alvor, you can check Alvor weather in November.

Compare Alvor's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Alvor

December in Alvor brings a mild respite from the warmer months, offering a refreshing shift with cooler temperatures and increased humidity. While the days are still relatively pleasant, they are accompanied by the occasional rain, resulting in a more inviting atmosphere for cozy indoor activities. This month’s blend of lower temperatures and the occasional drizzle contrasts with the sunny, warm days typical of Alvor's summer, making December a unique time to experience the charm of this coastal town. For more insights, checkout the detailed information available at Alvor Climate.