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December Weather in Alvaiazere, Portugal

Last updated: August 27, 2025

In Alvaiazere, Portugal, the average temperature in December hovers around 11°C (52°F). During this time, temperatures can dip to a chilly -1°C (30°F) or rise to a pleasant 19°C (66°F). Expect around 93 mm (3.7 in) of precipitation spread over 11 days, resulting in an average humidity of 85%. Stay prepared for a mix of brisk air and the occasional rain!

December Temperature in Alvaiazere

In December in Alvaiazere, the average temperature is 11°C (52°F). The maximum can reach 19°C (66°F), and the minimum can be as low as -1°C (30°F). Prepare for a mix of cool and mild weather, making it a perfect time for layered clothing and outdoor exploration.

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

The chart illustrates December temperature patterns in Alvaiazere, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Alvaiazere, December typically has an average temperature of 11°C (52°F), with highs reaching up to 19°C (66°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec485254576366707069635451
Data source: Temperature data for Alvaiazere 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 Alvaiazere

In Alvaiazere in December, the precipitation amount is 93 mm (3.7 in) over the course of 11 days, indicating that rain is expected to be fairly frequent during that time.

December Precipitation Trends in Alvaiazere

The chart displays monthly precipitation patterns in Alvaiazere, 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. In Alvaiazere, December typically receives around 93 mm (3.7 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec5574112112602579398311193
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Alvaiazere

In Alvaiazere in December, humidity is 85%. With an average temperature of 11°C (52°F), this humidity feels like a damp blanket wrapping around you, making travel quite uncomfortable as the air feels heavy and can sap your energy.

December Average Humidity in Alvaiazere

This chart illustrates the average monthly humidity levels in Alvaiazere, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Alvaiazere is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%75%72%70%70%63%60%60%68%74%83%85%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Alvaiazere

In Alvaiazere in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Alvaiazere, you can check the information here.

Maximum UV Index Levels in Alvaiazere for December

The chart shows the monthly maximum UV Index (UVI) for Alvaiazere 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. In December, the maximum UV index in Alvaiazere typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec346810111098643
Data source: Alvaiazere 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.

How December Weather in Alvaiazere Compares to Other Months

Weather in Alvaiazere varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Alvaiazere, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Alvaiazere, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (48°F)55 mm (2.2 inches)85%moderate
February Weather11°C (52°F)74 mm (2.9 inches)75%moderate
March Weather12°C (54°F)112 mm (4.4 inches)72%high
April Weather14°C (57°F)112 mm (4.4 inches)70%very high
May Weather17°C (63°F)60 mm (2.4 inches)70%very high
June Weather19°C (66°F)25 mm (1.0 inches)63%extreme
July Weather21°C (70°F)7 mm (0.3 inches)60%very high
August Weather21°C (70°F)9 mm (0.3 inches)60%very high
September Weather20°C (69°F)39 mm (1.5 inches)67%very high
October Weather17°C (63°F)83 mm (3.3 inches)74%high
November Weather12°C (55°F)111 mm (4.4 inches)83%moderate
December Weather11°C (52°F)93 mm (3.7 inches)85%moderate

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