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December Weather in Montemor-o-Velho, Portugal

Last updated: August 27, 2025

In December, the average temperature in Montemor-o-Velho, Portugal hovers around 12°C (54°F), with a minimum dropping to 2°C (35°F) and a maximum reaching 19°C (66°F). Expect precipitation of approximately 110 mm (4.3 in) spread over 13 days, and prepare for a high average humidity of 87%.

December Temperature in Montemor-o-Velho

In December in Montemor-o-Velho, the average temperature is 12°C (54°F). Maximums can reach 19°C (66°F) and minimums can drop as low as 2°C (35°F). This mild climate makes Montemor-o-Velho a suitable destination for travelers seeking comfortable weather for outdoor activities.

December Weather in Montemor-o-Velho: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Montemor-o-Velho, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Montemor-o-Velho, December typically has an average temperature of 12°C (54°F), with highs reaching up to 19°C (66°F) and lows dropping to around 2°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec505455586365686867635654
Data source: Temperature data for Montemor-o-Velho 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 Montemor-o-Velho

In Montemor-o-Velho in December, the total precipitation amount is 110 mm (4.3 in) over the course of 13 days.

December Precipitation Trends in Montemor-o-Velho

The chart displays monthly precipitation patterns in Montemor-o-Velho, 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 Montemor-o-Velho, December typically receives around 110 mm (4.3 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec63851031045829993090122110
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Montemor-o-Velho

In Montemor-o-Velho in December humidity is 87%. With an average temperature of 12°C (54°F), this humidity feels like a damp embrace, making it quite uncomfortable for traveling, as the air feels heavy and can quickly sap your energy as you explore the sights.

December Average Humidity in Montemor-o-Velho

This chart illustrates the average monthly humidity levels in Montemor-o-Velho, 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 Montemor-o-Velho is approximately 87%, offering insight into how humid the weather typically is during this month.
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 Montemor-o-Velho

In Montemor-o-Velho in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Montemor-o-Velho, you can visit Hourly UV Index in Montemor-o-Velho.

Maximum UV Index Levels in Montemor-o-Velho for December

The chart shows the monthly maximum UV Index (UVI) for Montemor-o-Velho 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 Montemor-o-Velho typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34689101098642
Data source: Montemor-o-Velho 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 Montemor-o-Velho Compares to Other Months

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

This table compares monthly weather conditions in Montemor-o-Velho, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (51°F)63 mm (2.5 inches)87%moderate
February Weather12°C (54°F)85 mm (3.3 inches)81%moderate
March Weather13°C (55°F)103 mm (4.1 inches)78%high
April Weather14°C (58°F)104 mm (4.1 inches)79%very high
May Weather17°C (63°F)58 mm (2.3 inches)78%very high
June Weather18°C (65°F)29 mm (1.1 inches)71%very high
July Weather20°C (68°F)9 mm (0.4 inches)63%very high
August Weather20°C (68°F)9 mm (0.3 inches)64%very high
September Weather20°C (67°F)30 mm (1.2 inches)71%very high
October Weather17°C (63°F)90 mm (3.5 inches)79%high
November Weather14°C (57°F)122 mm (4.8 inches)86%moderate
December Weather12°C (54°F)110 mm (4.3 inches)87%low

Compare Montemor-o-Velho's Climate with Cities Worldwide