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December Weather in Rosais, Portugal

Last updated: August 27, 2025

In Rosais, Portugal, the average temperature in December hovers around 17°C (62°F), with a comfortable minimum of 12°C (54°F) and a pleasant maximum of 20°C (68°F). However, be prepared for a bit of rain, as 103 mm (4.1 in) of precipitation typically falls over 14 days. Keep in mind that the average humidity level is quite high at 85%, which may add a touch of mugginess to the air!

December Temperature in Rosais

In December in Rosais, the average temperature is 17°C (62°F), with maximums reaching 20°C (68°F) and minimums dropping to 12°C (54°F). This weather makes it a comfortable time for traveling and exploring the area.

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

The chart illustrates December temperature patterns in Rosais, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rosais, December typically has an average temperature of 17°C (62°F), with highs reaching up to 20°C (68°F) and lows dropping to around 12°C (54°F).
JanFebMarAprMayJunJulAugSepOctNovDec605959596265697271686462
Data source: Temperature data for Rosais 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 Rosais

In Rosais in December, the precipitation amount is 103 mm (4.1 in) distributed over a period of 14 days.

December Precipitation Trends in Rosais

The chart displays monthly precipitation patterns in Rosais, 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 Rosais, December typically receives around 103 mm (4.1 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec84775675584028525175122103
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Rosais

In Rosais in December humidity is 85%. With an average temperature of 17°C (62°F), this humidity feels like a warm, heavy blanket enveloping you, making travel somewhat uncomfortable as you navigate the thick, moist air that clings to your skin and slows your pace.

December Average Humidity in Rosais

This chart illustrates the average monthly humidity levels in Rosais, 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 Rosais is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%83%85%85%83%85%86%83%83%79%80%85%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Rosais

In Rosais 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 Rosais, you can check the information here.

Maximum UV Index Levels in Rosais for December

The chart shows the monthly maximum UV Index (UVI) for Rosais 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 Rosais typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3578101110109743
Data source: Rosais 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 Rosais Compares to Other Months

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

This table compares monthly weather conditions in Rosais, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather16°C (61°F)84 mm (3.3 inches)84%moderate
February Weather15°C (59°F)77 mm (3.0 inches)83%moderate
March Weather15°C (59°F)56 mm (2.2 inches)85%high
April Weather15°C (60°F)75 mm (2.9 inches)85%very high
May Weather16°C (62°F)58 mm (2.3 inches)83%very high
June Weather19°C (66°F)40 mm (1.6 inches)85%extreme
July Weather21°C (70°F)28 mm (1.1 inches)86%very high
August Weather22°C (72°F)51 mm (2.0 inches)83%very high
September Weather22°C (71°F)51 mm (2.0 inches)83%very high
October Weather20°C (68°F)75 mm (2.9 inches)79%high
November Weather18°C (65°F)122 mm (4.8 inches)80%moderate
December Weather17°C (62°F)103 mm (4.1 inches)85%moderate

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