December Weather in Aveiro, Portugal

Last updated: February 24, 2025

In Aveiro, Portugal, December presents a mild climate characterized by a maximum temperature of 19°C (66°F) and an average of 12°C (54°F). The chill of the season is underscored by minimum temperatures dipping to 3°C (38°F). Visitors should prepare for relatively wet conditions, as the city experiences about 150 mm (5.9 in) of precipitation over approximately 14 days of the month. With an average humidity level of 87%, December in Aveiro combines a refreshing coastal atmosphere with a festive spirit, making it an intriguing time to explore this charming locale.

December Temperature in Aveiro

In Aveiro, Portugal, December marks the transition to winter as temperatures dip slightly, with minimums averaging around 3°C (38°F). Throughout the month, the weather maintains a crisp bite, but daytime averages hover around 12°C (54°F), providing a cool yet manageable atmosphere for exploration. Daylight hours feature maximums peaking at 19°C (66°F), which, while cooler than the preceding months, still allows for enjoyable outdoor activities. As the year closes, Aveiro's December temperatures reflect a consistent downward trend, preparing visitors for the chilly embrace of winter while still offering glimpses of warmth reminiscent of the previous fall months.

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

The chart illustrates December temperature patterns in Aveiro, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec515455586365686867635754
Data source: Temperature data for Aveiro 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 Aveiro

In Aveiro, Portugal, December marks a peak in precipitation, with an impressive 150 mm (5.9 in) falling over 14 days, making it one of the wettest months of the year. This significant rainfall follows a trend established in the preceding months, particularly November, which also recorded a high of 137 mm (5.4 in). Interestingly, December's downpours signal the onset of winter, contrasting sharply with the drier summer months, where July and August saw merely 13 mm (0.5 in) and 14 mm (0.5 in) of rain, respectively. This seasonal shift highlights Aveiro's characteristic weather patterns, where the winter months bring increased moisture, setting the stage for the lush landscapes that define this picturesque region.

December Precipitation Trends in Aveiro

The chart displays monthly precipitation patterns in Aveiro, 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.
JanFebMarAprMayJunJulAugSepOctNovDec771091141146432131432101137150
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Aveiro

In Aveiro, Portugal, December brings a return to increased humidity, mirroring the highest levels seen earlier in the year at 87%. This month stands out as the culmination of a subtle trend where humidity gradually slips from a comfortable 78% in the spring months to a notable 63% in the summer. As autumn unfolds, levels creep back up, peaking in December and coinciding with the chill of winter. This rhythmic fluctuation highlights not only the city's coastal climate but also a sense of balance between refreshing breezes and seasonal shifts. With the year's end marked by lush humidity, Aveiro is truly a testament to the dynamic nature of its environment.

December Average Humidity in Aveiro

This chart illustrates the average monthly humidity levels in Aveiro, 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.
JanFebMarAprMayJunJulAugSepOctNovDec87%81%78%79%78%71%63%64%71%79%86%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Aveiro

As December rolls into Aveiro, Portugal, the UV Index dips to a low level of 2, signaling a welcome respite from the intense sun of the preceding months. This decline in UV exposure extends the safe burn time to approximately 45 minutes, allowing for longer outdoor activities without the immediate concern of sunburn. Following a summer where the index peaked at 10—indicative of very high exposure—residents and visitors can now enjoy a more moderate sun climate. This trend showcases the shifting patterns of UV radiation throughout the year, reinforcing the importance of monitoring UV levels for sun safety. To explore more on the UV Index throughout the year, check out Aveiro UV Index.

Maximum UV Index Levels in Aveiro for December

The chart shows the monthly maximum UV Index (UVI) for Aveiro 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.
JanFebMarAprMayJunJulAugSepOctNovDec24689101098642
Data source: Aveiro 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 Aveiro

In Aveiro, Portugal, December greets visitors with a charming 192 hours of sunshine, a cozy contrast to the peak of summer, which basks in over 400 hours of radiant light. As the year draws to a close, the sun begins its retreat from the vibrant highs of July and June, where daylight thrives at its maximum, creating a gentle decline through the autumn months. While December's sunny offerings are less abundant compared to the spring's blossoming brightness and the summer's golden days, this tranquil winter glow invites a unique experience of the city. With an overall trend of diminishing sunlight as the year wanes, Aveiro reveals its winter charm, allowing travelers to embrace the serenity of its historic canals and stunning architecture in a softly illuminated, picturesque setting.

Monthly Sunshine Duration in Aveiro: December Highlighted

The December sunshine duration represents the total number of hours Aveiro 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.
JanFebMarAprMayJunJulAugSepOctNovDec165h215h293h347h406h407h424h393h346h303h212h192h
Data source: Aveiro December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Aveiro During December

In Aveiro, Portugal, December tends to feature a lower likelihood of sunny weather, with a 37% chance of enjoying clear skies. This marks a notable decline compared to the sunniest months, such as August, which boasts a 65% likelihood of sunshine. As the year progresses into the winter months, the sunny probabilities generally drop, with November peaking at 69% before the decrease in December. This trend suggests a transition from the warmer, brighter days of summer to the cooler, grayer conditions of winter, making December a less predictable month for those seeking sunshine in Aveiro.

Percentage of Sunny Days in December in Aveiro

The chart illustrates the percentage of sunny days in Aveiro 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 Aveiro experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec51%21%58%41%50%59%61%65%48%47%69%37%
Data source: Aveiro December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Aveiro in December

In Aveiro, Portugal, December ushers in a return to shorter days, with only 9 hours of daylight—a trend that mirrors both the preceding January and the following November. This seasonal shift emphasizes a gradual decline in daylight as the year progresses from the sun-drenched expanses of summer, which see up to 15 hours in June, down to the winter months where daylight dwindles. Notably, the spring and early summer months, particularly April and May, experience a delightful increase, peaking at 14 hours in May, before the days begin to shorten yet again. This rhythmic ebb and flow of daylight not only shapes the climate but also sets the scene for Aveiro’s picturesque landscapes, reflecting the beauty of each distinct season throughout the year.

Average Daylight Hours in Aveiro for December

The chart illustrates the variation in daylight duration in Aveiro throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 37m10h 39m11h 57m13h 18m14h 27m15h 1m14h 43m13h 42m12h 24m11h 4m9h 54m9h 18m
Data source: Aveiro daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Aveiro

In Aveiro, Portugal, December ushers in a refreshing gust of change, as the average wind speed rises to 4.9 m/s (11 mph), marking a notable increase compared to the preceding months. This seasonal uptick in wind vigor reflects a broader trend observed throughout the year, where wind speeds generally fluctuate between 3.2 m/s (7 mph) in April to 5.3 m/s (12 mph) in February. Notably, December's wind is not only the highest since February; it also indicates a shift from the calmer autumn months into the brisk winter period. As the year draws to a close, residents and visitors alike can enjoy the invigorating breezes that make Aveiro's scenery even more enchanting.

Average December Wind Speed in Aveiro

The chart displays monthly wind speed patterns in Aveiro, 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.
JanFebMarAprMayJunJulAugSepOctNovDec4.55.33.63.24.44.54.73.93.73.53.94.9 m/s
Data source: Aveiro December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Aveiro Compares to Other Months

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

December weather typically features a slightly warmer average temperature of 12°C (54°F), with maximums reaching up to 19°C (66°F). However, it's also wetter, with about 150 mm (5.9 in) of precipitation spread over 14 days. In contrast, January sees a minor drop in average temperature to 11°C (51°F) and maximums of 20°C (69°F), while experiencing significantly less rainfall at 77 mm (3.0 in) over just 8 days. Both months maintain a consistent humidity level of 87%, making the air feel equally damp. For more details, visit Aveiro weather in January.

December and February in Aveiro exhibit relatively similar temperatures, with both months featuring a minimum of around 3°C and an average of 12°C. However, February tends to be slightly warmer on average, reaching up to 21°C compared to December’s maximum of 19°C. Precipitation is also lower in February, with 109 mm over 11 days, compared to December's 150 mm over 14 days. Additionally, February experiences a bit less humidity at 81%, compared to December's higher level of 87%. For more detailed insights, check out Aveiro weather in February.

In December, the weather is generally cool and wet, with average temperatures ranging from a minimum of 3°C (38°F) to a maximum of 19°C (66°F). The month is characterized by high humidity levels at 87% and significant precipitation, amounting to 150 mm (5.9 in) over about 14 days. In contrast, March offers a slight increase in temperatures, with a minimum of 4°C (40°F) and a maximum that can reach 24°C (76°F). Precipitation decreases to 114 mm (4.5 in) over 11 days, and humidity levels drop to 78%. For a closer look at what to expect during this transition into spring, check out Aveiro weather in March.

In December, the weather tends to be cooler, with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 19°C (66°F). The month is characterized by higher precipitation, averaging 150 mm (5.9 in) over approximately 14 days, and humidity levels are relatively high at 87%. In contrast, April sees a rise in temperatures, with lows around 6°C (44°F) and highs reaching 26°C (79°F). Precipitation decreases to an average of 114 mm (4.5 in) over 12 days, and humidity levels drop to 79%, making April feel more pleasant overall. For more detailed information, you can visit Aveiro weather in April.

December weather is characterized by cooler temperatures, ranging from a minimum of 3°C (38°F) to a maximum of 19°C (66°F), with an average of 12°C (54°F). The month sees significant precipitation, totaling 150 mm (5.9 in) over 14 days, along with high humidity levels at 87%. In contrast, May brings warmer conditions, with temperatures ranging from a minimum of 9°C (48°F) to a maximum of 30°C (87°F), averaging 17°C (63°F). The precipitation in May drops to 64 mm (2.5 in) over only 8 days, and humidity decreases to 78%. For more insights into May weather, you can explore Aveiro weather in May.

In December, the weather is considerably cooler, with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 19°C (66°F), averaging around 12°C (54°F). This month also sees significant rainfall, with about 150 mm (5.9 in) spread over 14 days, contributing to a high humidity level of 87%.

In contrast, June offers a much warmer climate, with temperatures ranging from a minimum of 11°C (52°F) to a maximum of 30°C (86°F), averaging 18°C (65°F). Precipitation is significantly lower, at only 32 mm (1.3 in) over 7 days, and humidity drops to a more comfortable 71%. For more detailed information, you can check Aveiro weather in June.

December and July present distinctly contrasting weather patterns. In December, temperatures range from a chilly minimum of 3°C (38°F) to a mild maximum of 19°C (66°F), with an average around 12°C (54°F). The month is notably wet, with approximately 150 mm (5.9 inches) of precipitation spread across 14 days, contributing to a high humidity level of 87%. In contrast, July boasts much warmer conditions, with temperatures starting at a minimum of 13°C (56°F) and soaring to a maximum of 33°C (91°F), averaging around 20°C (68°F). Rainfall is minimal, totaling only 13 mm (0.5 inches) over just 2 days, and humidity drops significantly to 63%. For more details, check out Aveiro weather in July.

The weather in December is notably cooler and wetter compared to August. With temperatures ranging from a minimum of 3°C (38°F) to a maximum of 19°C (66°F), December experiences an average temperature of 12°C (54°F). It also sees significant precipitation, with about 150 mm (5.9 in) falling over 14 days, resulting in high humidity levels at 87%. In contrast, August boasts much milder temperatures, with a minimum of 13°C (56°F) and a maximum reaching 32°C (91°F), averaging 20°C (69°F). Additionally, August is characterized by low precipitation, only 14 mm (0.5 in) over just 2 days, and a more comfortable humidity level of 64%. For more detailed information, you can check Aveiro weather in August.

December weather is markedly cooler and wetter compared to September. In December, temperatures range from a chilly minimum of 3°C (38°F) to a comfortable maximum of 19°C (66°F), with an average of 12°C (54°F). This month sees a significant amount of rainfall, totaling 150 mm (5.9 in) over about 14 days, contributing to a humid atmosphere with 87% humidity. In contrast, September enjoys milder temperatures, with a minimum of 11°C (52°F) and a maximum of 31°C (88°F), averaging around 20°C (68°F). Additionally, precipitation is much lower in September, measuring only 32 mm (1.3 in) over approximately 4 days, and with a humidity level of 71%. For more details about September weather in Aveiro, visit Aveiro weather in September.

When comparing the weather of December to that of October, notable differences emerge. December typically sees cooler temperatures, with a minimum of 3°C and an average of 12°C, while October experiences milder conditions, with temperatures ranging from a minimum of 8°C to an average of 17°C. Precipitation is more frequent in December, averaging 150 mm over 14 days, compared to October's 101 mm over 9 days. Furthermore, December's humidity is higher at 87%, while October maintains a lower humidity level of 79%. For a more detailed look at October weather, you can visit Aveiro weather in October.

In comparing the weather of December and November, December tends to be cooler with average temperatures ranging from a minimum of 3°C (38°F) to a maximum of 19°C (66°F), while November offers slightly warmer conditions, with temperatures ranging from a minimum of 6°C (44°F) to a maximum of 23°C (73°F). Precipitation levels are quite similar between the two months, with December receiving 150 mm (5.9 in) and November slightly less at 137 mm (5.4 in), both averaging rain on 14 days. Additionally, December features a slightly higher humidity level at 87% compared to November's 86%. For more detailed insights on November weather, check out Aveiro weather in November.

Compare Aveiro's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Aveiro

December in Aveiro ushers in a distinct shift from the milder temperatures of autumn, presenting a cozy yet spirited atmosphere perfect for enjoying the holiday season. With maximums reaching up to 19°C (66°F) and a noteworthy average of 12°C (54°F), the month feels refreshingly cool but not overly cold, inviting locals and visitors alike to bask in the charm of the town. However, it also ushers in considerable rainfall, averaging about 150 mm (5.9 in) over 14 rainy days, which contributes to the region's lush landscapes. The heightened humidity at 87% adds to the brisk ambiance, making December a month of contrasts in Aveiro. For a deeper dive into annual climate variations, visit Aveiro Climate.