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December Weather in Rio Meao, Portugal

Last updated: August 27, 2025

In December, the average temperature in Rio Meao, Portugal hovers around 11°C (51°F), making it a cool time of year. Temperatures can dip as low as 0°C (33°F) and soar up to 19°C (66°F). Be prepared for moisture, as the region receives an average of 194 mm (7.6 in) of precipitation over 14 days. With an average humidity of 87%, it's advisable to pack for a cozy and damp climate!

December Temperature in Rio Meao

In December, in Rio Meao, the average temperature is 11°C (51°F). The maximum can reach 19°C (66°F) and the minimum can be as low as 0°C (33°F). Be prepared for a cool climate, ideal for layering and exploring outdoor activities.

December Weather in Rio Meao: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Rio Meao, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rio Meao, December typically has an average temperature of 11°C (51°F), with highs reaching up to 19°C (66°F) and lows dropping to around 0°C (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec485153576264696967615451
Data source: Temperature data for Rio Meao 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 Rio Meao

In Rio Meao in December, the total precipitation amount is 194 mm (7.6 in), occurring over a span of 14 days.

December Precipitation Trends in Rio Meao

The chart displays monthly precipitation patterns in Rio Meao, 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 Rio Meao, December typically receives around 194 mm (7.6 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec901381441548455241945120164194
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Rio Meao

In Rio Meao in December humidity is 87%. With an average temperature of 11°C (51°F), this humidity feels like a damp chill wrapping around you, making outdoor excursions a bit uncomfortable as the air feels thick and heavy, urging you to seek shelter more often than not.

December Average Humidity in Rio Meao

This chart illustrates the average monthly humidity levels in Rio Meao, 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 Rio Meao 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 Rio Meao

In Rio Meao 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 Rio Meao, you can visit Hourly UV Index in Rio Meao.

Maximum UV Index Levels in Rio Meao for December

The chart shows the monthly maximum UV Index (UVI) for Rio Meao 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 Rio Meao typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24689111098642
Data source: Rio Meao 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 Rio Meao Compares to Other Months

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

This table compares monthly weather conditions in Rio Meao, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (48°F)90 mm (3.5 inches)87%low
February Weather11°C (52°F)138 mm (5.4 inches)81%moderate
March Weather12°C (53°F)144 mm (5.7 inches)78%high
April Weather14°C (57°F)154 mm (6.1 inches)79%very high
May Weather17°C (62°F)84 mm (3.3 inches)78%very high
June Weather18°C (65°F)55 mm (2.1 inches)71%extreme
July Weather20°C (69°F)24 mm (1.0 inches)63%very high
August Weather21°C (69°F)19 mm (0.7 inches)64%very high
September Weather20°C (68°F)45 mm (1.8 inches)71%very high
October Weather16°C (62°F)120 mm (4.7 inches)79%high
November Weather12°C (54°F)164 mm (6.5 inches)86%moderate
December Weather11°C (51°F)194 mm (7.6 inches)87%low

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