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December Weather in San Martin del Rio, Spain

Last updated: August 27, 2025

In San Martin del Rio, Spain, the average temperature in December hovers around 5°C (42°F), with extremes ranging from a chilly -6°C (21°F) to a pleasant 19°C (66°F). Rainfall typically accumulates to 32 mm (1.3 in) over about 7 days, contributing to a notable average humidity of 84%. Be prepared for a mix of cool weather and moisture during your visit!

December Temperature in San Martin del Rio

In December in San Martin del Rio the average temperature is 5°C (42°F). Maximum can reach 19°C (66°F) and minimum can be as low as -6°C (21°F). It's advisable to pack layers to stay comfortable while exploring the local attractions.

December Weather in San Martin del Rio: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in San Martin del Rio, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Martin del Rio, December typically has an average temperature of 5°C (42°F), with highs reaching up to 19°C (66°F) and lows dropping to around -6°C (21°F).
JanFebMarAprMayJunJulAugSepOctNovDec384346516068747365564541
Data source: Temperature data for San Martin del Rio 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 San Martin del Rio

In San Martin del Rio in December, the precipitation amount is 32 mm (1.3 in) over the course of 7 days.

December Precipitation Trends in San Martin del Rio

The chart displays monthly precipitation patterns in San Martin del Rio, 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 San Martin del Rio, December typically receives around 32 mm (1.3 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec392747895654192630375732
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in San Martin del Rio

In San Martin del Rio in December, humidity is 84%. With an average temperature of 5°C (42°F), this humidity feels like a thick blanket wrapping around you, making every step feel heavier while traveling.

December Average Humidity in San Martin del Rio

This chart illustrates the average monthly humidity levels in San Martin del Rio, 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 San Martin del Rio is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%80%73%69%64%59%58%58%64%76%82%84%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in San Martin del Rio

In San Martin del Rio 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 San Martin del Rio, you can visit Hourly UV Index in San Martin del Rio.

Maximum UV Index Levels in San Martin del Rio for December

The chart shows the monthly maximum UV Index (UVI) for San Martin del Rio 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 San Martin del Rio typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec346810111198642
Data source: San Martin del Rio 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 San Martin del Rio Compares to Other Months

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

This table compares monthly weather conditions in San Martin del Rio, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (38°F)39 mm (1.5 inches)85%moderate
February Weather6°C (44°F)27 mm (1.1 inches)80%moderate
March Weather8°C (47°F)47 mm (1.9 inches)73%high
April Weather10°C (51°F)89 mm (3.5 inches)69%very high
May Weather15°C (60°F)56 mm (2.2 inches)64%very high
June Weather20°C (68°F)54 mm (2.1 inches)59%extreme
July Weather23°C (74°F)19 mm (0.8 inches)58%extreme
August Weather23°C (74°F)26 mm (1.0 inches)58%very high
September Weather18°C (65°F)30 mm (1.2 inches)64%very high
October Weather13°C (56°F)37 mm (1.5 inches)76%high
November Weather7°C (45°F)57 mm (2.2 inches)82%moderate
December Weather5°C (42°F)32 mm (1.3 inches)84%low

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