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December Weather in San Isidro, Spain

Last updated: August 27, 2025

In December, the average temperature in San Isidro, Spain hovers around 18°C (65°F), offering a pleasant climate for outdoor activities. Expect temperatures to range from a minimum of 15°C (60°F) to a maximum of 23°C (73°F). With an average humidity of 74%, the air feels comfortably mild. However, be prepared for some occasional rain, as precipitation averages 25 mm (1.0 in) over 6 days throughout the month.

December Temperature in San Isidro

In December in San Isidro, the average temperature is 18°C (65°F). Maximums can reach 23°C (73°F) and minimums can be as low as 15°C (60°F). This mild weather makes it an ideal time for travelers to explore the beauty of San Isidro.

December Weather in San Isidro: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in San Isidro, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Isidro, December typically has an average temperature of 18°C (65°F), with highs reaching up to 23°C (73°F) and lows dropping to around 15°C (60°F).
JanFebMarAprMayJunJulAugSepOctNovDec626362636568717472716764
Data source: Temperature data for San Isidro 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 Isidro

In San Isidro in December, the precipitation amount is 25 mm (1.0 in) spread over 6 days.

December Precipitation Trends in San Isidro

The chart displays monthly precipitation patterns in San Isidro, 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 Isidro, December typically receives around 25 mm (1.0 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec363843523514219223125
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in San Isidro

In San Isidro in December humidity is 74%. With an average temperature of 18°C (65°F), this humidity feels like a warm, sticky embrace that can make even short walks feel laborious, leading travelers to seek shade and refreshment more often.

December Average Humidity in San Isidro

This chart illustrates the average monthly humidity levels in San Isidro, 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 Isidro is approximately 74%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec74%76%81%83%82%85%89%90%88%85%80%74%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in San Isidro

In San Isidro in December, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in San Isidro, you can refer to this Hourly UV Index in San Isidro.

Maximum UV Index Levels in San Isidro for December

The chart shows the monthly maximum UV Index (UVI) for San Isidro 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 Isidro typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec579111212121111976
Data source: San Isidro 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 Isidro Compares to Other Months

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

This table compares monthly weather conditions in San Isidro, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather17°C (63°F)36 mm (1.4 inches)73%moderate
February Weather17°C (63°F)38 mm (1.5 inches)76%high
March Weather17°C (62°F)43 mm (1.7 inches)81%very high
April Weather17°C (63°F)52 mm (2.0 inches)83%extreme
May Weather19°C (66°F)35 mm (1.4 inches)82%extreme
June Weather20°C (68°F)14 mm (0.6 inches)85%extreme
July Weather22°C (72°F)2 mm (0.1 inches)89%extreme
August Weather23°C (74°F)1 mm (0.1 inches)90%extreme
September Weather22°C (72°F)9 mm (0.4 inches)88%extreme
October Weather22°C (71°F)22 mm (0.9 inches)85%very high
November Weather20°C (67°F)31 mm (1.2 inches)80%high
December Weather18°C (65°F)25 mm (1.0 inches)74%high

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