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December Weather in Castellar de Santiago, Spain

Last updated: August 27, 2025

In December, the average temperature in Castellar de Santiago, Spain is a crisp 8°C (46°F). Expect a range from a chilly -3°C (27°F) to a pleasant 21°C (70°F). With 56 mm (2.2 in) of precipitation over about 7 days, don't forget your umbrella! The average humidity hovers around a high 86%, contributing to the cool, refreshing air typical of the season.

December Temperature in Castellar de Santiago

In December in Castellar de Santiago, the average temperature is 8°C (46°F), with maximums reaching 21°C (70°F) and minimums dropping as low as -3°C (27°F). This varied climate makes Castellar de Santiago an intriguing destination for travelers looking to experience a range of weather conditions.

December Weather in Castellar de Santiago: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Castellar de Santiago, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castellar de Santiago, December typically has an average temperature of 8°C (46°F), with highs reaching up to 21°C (70°F) and lows dropping to around -3°C (27°F).
JanFebMarAprMayJunJulAugSepOctNovDec434851566675828273635146
Data source: Temperature data for Castellar de Santiago 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 Castellar de Santiago

In Castellar de Santiago in December, the total precipitation amount is 56 mm (2.2 in) over a period of 7 days.

December Precipitation Trends in Castellar de Santiago

The chart displays monthly precipitation patterns in Castellar de Santiago, 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 Castellar de Santiago, December typically receives around 56 mm (2.2 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec34357692361681628417056
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Castellar de Santiago

In Castellar de Santiago in December humidity is 86%. With an average temperature of 8°C (46°F), this humidity feels like a damp chill enveloping you, making outdoor activities less enjoyable and requiring extra layers to stay comfortable while exploring.

December Average Humidity in Castellar de Santiago

This chart illustrates the average monthly humidity levels in Castellar de Santiago, 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 Castellar de Santiago is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%78%66%60%56%44%44%42%53%70%83%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Castellar de Santiago

In Castellar de Santiago 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 Castellar de Santiago, you can check the information here.

Maximum UV Index Levels in Castellar de Santiago for December

The chart shows the monthly maximum UV Index (UVI) for Castellar de Santiago 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 Castellar de Santiago typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3569101211109743
Data source: Castellar de Santiago 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 Castellar de Santiago Compares to Other Months

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

This table compares monthly weather conditions in Castellar de Santiago, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (43°F)34 mm (1.3 inches)85%moderate
February Weather9°C (49°F)35 mm (1.4 inches)78%moderate
March Weather11°C (52°F)76 mm (3.0 inches)66%high
April Weather13°C (56°F)92 mm (3.6 inches)60%very high
May Weather19°C (66°F)36 mm (1.4 inches)56%very high
June Weather24°C (75°F)16 mm (0.6 inches)44%extreme
July Weather28°C (82°F)8 mm (0.3 inches)44%extreme
August Weather28°C (83°F)16 mm (0.6 inches)42%very high
September Weather23°C (73°F)28 mm (1.1 inches)53%very high
October Weather17°C (63°F)41 mm (1.6 inches)70%high
November Weather10°C (51°F)70 mm (2.7 inches)83%moderate
December Weather8°C (46°F)56 mm (2.2 inches)86%moderate

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