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December Weather in Samil, Portugal

Last updated: August 27, 2025

In Samil, Portugal, the average temperature in December hovers around 6°C (43°F). Expect a minimum dip to -4°C (26°F) and a maximum rise to 15°C (60°F). This month typically sees about 127 mm (5.0 in) of precipitation spread over 12 days, resulting in an average humidity level of 91%. Prepare for a brisk and wet atmosphere!

December Temperature in Samil

In December in Samil, the average temperature is 6°C (43°F). The maximum can reach 15°C (60°F), and the minimum can be as low as -4°C (26°F). This range makes it a great time for travelers to enjoy outdoor activities while being prepared for some chilly moments.

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

The chart illustrates December temperature patterns in Samil, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Samil, December typically has an average temperature of 6°C (43°F), with highs reaching up to 15°C (60°F) and lows dropping to around -4°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec404547525965717065574743
Data source: Temperature data for Samil 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 Samil

In Samil in December, the precipitation amount is 127 mm (5.0 in) occurring over the course of 12 days.

December Precipitation Trends in Samil

The chart displays monthly precipitation patterns in Samil, 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 Samil, December typically receives around 127 mm (5.0 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec549510092514818164575110127
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Samil

In Samil in December, humidity is 91%. With an average temperature of 6°C (43°F), this humidity feels like a thick blanket wrapped around you, making travel uncomfortable and sticky as every step becomes a challenge against the heavy, damp air.

December Average Humidity in Samil

This chart illustrates the average monthly humidity levels in Samil, 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 Samil is approximately 91%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%85%79%77%76%64%54%52%63%78%90%91%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Samil

In Samil 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 Samil, you can visit Hourly UV Index in Samil.

Maximum UV Index Levels in Samil for December

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

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

This table compares monthly weather conditions in Samil, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (40°F)54 mm (2.1 inches)91%low
February Weather7°C (45°F)95 mm (3.7 inches)85%moderate
March Weather8°C (47°F)99 mm (3.9 inches)79%high
April Weather11°C (52°F)92 mm (3.6 inches)77%very high
May Weather15°C (60°F)51 mm (2.0 inches)76%very high
June Weather18°C (65°F)48 mm (1.9 inches)64%extreme
July Weather22°C (71°F)18 mm (0.7 inches)54%very high
August Weather21°C (71°F)16 mm (0.6 inches)52%very high
September Weather18°C (65°F)45 mm (1.8 inches)63%very high
October Weather14°C (57°F)74 mm (2.9 inches)78%high
November Weather8°C (47°F)110 mm (4.3 inches)90%moderate
December Weather6°C (43°F)127 mm (5.0 inches)91%low

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