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December Weather in Arraiolos, Portugal

Last updated: August 27, 2025

In December, the average temperature in Arraiolos, Portugal is a cool 11°C (52°F), with minimums dipping to 0°C (32°F) and reaching a comfortable maximum of 20°C (68°F). Expect 63 mm (2.5 in) of precipitation over approximately 9 days, contributing to an average humidity of 85%. Whether you're exploring or relaxing indoors, be prepared for the refreshing climate!

December Temperature in Arraiolos

In December in Arraiolos, the average temperature is 11°C (52°F), with maximums reaching 20°C (68°F) and minimums dropping to as low as 0°C (32°F). This range makes it a great time for travelers to enjoy outdoor activities while being prepared for cooler evenings.

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

The chart illustrates December temperature patterns in Arraiolos, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Arraiolos, December typically has an average temperature of 11°C (52°F), with highs reaching up to 20°C (68°F) and lows dropping to around 0°C (32°F).
JanFebMarAprMayJunJulAugSepOctNovDec485355586670747673655652
Data source: Temperature data for Arraiolos 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 Arraiolos

In Arraiolos in December, the total precipitation amount is 63 mm (2.5 in) spread over a duration of 9 days.

December Precipitation Trends in Arraiolos

The chart displays monthly precipitation patterns in Arraiolos, 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 Arraiolos, December typically receives around 63 mm (2.5 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec3451918839155525436863
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Arraiolos

In Arraiolos 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 Arraiolos

This chart illustrates the average monthly humidity levels in Arraiolos, 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 Arraiolos 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 Arraiolos

In Arraiolos 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 Arraiolos, you can check the information here.

Maximum UV Index Levels in Arraiolos for December

The chart shows the monthly maximum UV Index (UVI) for Arraiolos 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 Arraiolos typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3569101110109643
Data source: Arraiolos 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 Arraiolos Compares to Other Months

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

This table compares monthly weather conditions in Arraiolos, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (49°F)34 mm (1.3 inches)85%moderate
February Weather12°C (53°F)51 mm (2.0 inches)75%moderate
March Weather13°C (55°F)91 mm (3.6 inches)72%high
April Weather15°C (59°F)88 mm (3.5 inches)70%very high
May Weather19°C (66°F)39 mm (1.5 inches)70%very high
June Weather21°C (70°F)15 mm (0.6 inches)63%extreme
July Weather24°C (75°F)5 mm (0.2 inches)60%very high
August Weather24°C (76°F)5 mm (0.2 inches)60%very high
September Weather23°C (73°F)25 mm (1.0 inches)67%very high
October Weather19°C (66°F)43 mm (1.7 inches)74%high
November Weather13°C (56°F)68 mm (2.7 inches)83%moderate
December Weather11°C (52°F)63 mm (2.5 inches)85%moderate

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