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December Weather in Marinha Grande, Portugal

Last updated: August 27, 2025

In December, the average temperature in Marinha Grande, Portugal hovers around 13°C (55°F), with a minimum dipping down to 5°C (40°F) and a maximum reaching 18°C (64°F). Expect 94 mm (3.7 in) of precipitation over approximately 12 days, contributing to a relatively high average humidity of 85%.

December Temperature in Marinha Grande

In December in Marinha Grande, the average temperature is 13°C (55°F). Maximum temperatures can reach 18°C (64°F), while minimums can drop to as low as 5°C (40°F). Pack a light jacket and enjoy exploring the pleasant, mild weather!

December Weather in Marinha Grande: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Marinha Grande, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Marinha Grande, December typically has an average temperature of 13°C (55°F), with highs reaching up to 18°C (64°F) and lows dropping to around 5°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec525455576163666666635755
Data source: Temperature data for Marinha Grande 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 Marinha Grande

In Marinha Grande in December, the precipitation amount is 94 mm (3.7 in) spread over 12 days.

December Precipitation Trends in Marinha Grande

The chart displays monthly precipitation patterns in Marinha Grande, 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 Marinha Grande, December typically receives around 94 mm (3.7 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec6071971015526109288211294
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Marinha Grande

In Marinha Grande in December, humidity is 85%. With an average temperature of 13°C (55°F), this humidity feels like a heavy blanket wrapping around you, making even short walks feel exhausting and urging travelers to seek shade and refreshment frequently.

December Average Humidity in Marinha Grande

This chart illustrates the average monthly humidity levels in Marinha Grande, 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 Marinha Grande 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 Marinha Grande

In Marinha Grande 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 Marinha Grande, you can check the information here.

Maximum UV Index Levels in Marinha Grande for December

The chart shows the monthly maximum UV Index (UVI) for Marinha Grande 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 Marinha Grande typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35699111098643
Data source: Marinha Grande 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 Marinha Grande Compares to Other Months

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

This table compares monthly weather conditions in Marinha Grande, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather11°C (52°F)60 mm (2.4 inches)85%moderate
February Weather12°C (55°F)71 mm (2.8 inches)75%moderate
March Weather13°C (56°F)97 mm (3.8 inches)72%high
April Weather14°C (58°F)101 mm (4.0 inches)70%very high
May Weather16°C (62°F)54 mm (2.1 inches)70%very high
June Weather17°C (63°F)26 mm (1.0 inches)63%extreme
July Weather19°C (66°F)10 mm (0.4 inches)60%very high
August Weather19°C (66°F)9 mm (0.3 inches)60%very high
September Weather19°C (66°F)28 mm (1.1 inches)67%very high
October Weather17°C (63°F)82 mm (3.2 inches)74%high
November Weather14°C (58°F)112 mm (4.4 inches)83%moderate
December Weather13°C (55°F)94 mm (3.7 inches)85%moderate

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