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December Weather in Castellar de Santisteban, Spain

Last updated: August 27, 2025

In December, the average temperature in Castellar de Santisteban, Spain hovers around 9°C (48°F). Be prepared for a chilly snap, as temperatures can dip to a brisk -5°C (24°F), while enjoying the warmth of highs reaching 22°C (71°F). Expect about 67 mm (2.6 in) of rain over 9 days, contributing to an average humidity of 86%, making it a rather damp experience during this time.

December Temperature in Castellar de Santisteban

In December in Castellar de Santisteban, the average temperature is 9°C (48°F). The maximum can reach 22°C (71°F), while the minimum can dip as low as -5°C (24°F). Be sure to pack layers to stay comfortable during your travels!

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

The chart illustrates December temperature patterns in Castellar de Santisteban, 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 Santisteban, December typically has an average temperature of 9°C (48°F), with highs reaching up to 22°C (71°F) and lows dropping to around -5°C (24°F).
JanFebMarAprMayJunJulAugSepOctNovDec445053586876848475655247
Data source: Temperature data for Castellar de Santisteban 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 Santisteban

In Castellar de Santisteban in December, the total precipitation amount is 67 mm (2.6 in), occurring over a span of 9 days.

December Precipitation Trends in Castellar de Santisteban

The chart displays monthly precipitation patterns in Castellar de Santisteban, 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 Santisteban, December typically receives around 67 mm (2.6 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec42427676281541223407967
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Castellar de Santisteban

In Castellar de Santisteban in December, humidity is 86%. With an average temperature of 9°C (48°F), this humidity feels like a damp chill that wraps around you, making outdoor activities uncomfortable and travel less enjoyable.

December Average Humidity in Castellar de Santisteban

This chart illustrates the average monthly humidity levels in Castellar de Santisteban, 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 Santisteban 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 Santisteban

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

Maximum UV Index Levels in Castellar de Santisteban for December

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

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

This table compares monthly weather conditions in Castellar de Santisteban, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather7°C (44°F)42 mm (1.7 inches)85%moderate
February Weather10°C (50°F)41 mm (1.6 inches)78%moderate
March Weather12°C (53°F)76 mm (3.0 inches)66%high
April Weather14°C (58°F)76 mm (3.0 inches)60%very high
May Weather20°C (68°F)28 mm (1.1 inches)56%very high
June Weather25°C (77°F)14 mm (0.6 inches)44%extreme
July Weather29°C (84°F)4 mm (0.2 inches)44%extreme
August Weather29°C (84°F)12 mm (0.5 inches)42%very high
September Weather24°C (75°F)23 mm (0.9 inches)53%very high
October Weather18°C (65°F)40 mm (1.6 inches)70%high
November Weather11°C (53°F)79 mm (3.1 inches)83%moderate
December Weather9°C (48°F)67 mm (2.6 inches)86%moderate

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