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December Weather in Castellsera, Spain

Last updated: August 27, 2025

In Castellsera, Spain, the average temperature in December hovers around 7°C (45°F). Expect low temperatures to dip as low as -4°C (25°F), while pleasant days can reach a maximum of 18°C (65°F). During this month, you can anticipate around 24 mm (0.9 in) of precipitation over 5 days, with an average humidity level of 79%.

December Temperature in Castellsera

In December in Castellsera, the average temperature is 7°C (45°F). The maximum can reach 18°C (65°F) while the minimum can drop to as low as -4°C (25°F). Be sure to pack layers to stay comfortable during your travels!

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

The chart illustrates December temperature patterns in Castellsera, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castellsera, December typically has an average temperature of 7°C (45°F), with highs reaching up to 18°C (65°F) and lows dropping to around -4°C (25°F).
JanFebMarAprMayJunJulAugSepOctNovDec424852576573797970615044
Data source: Temperature data for Castellsera 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 Castellsera

In Castellsera in December, the precipitation amount is 24 mm (0.9 in) over the course of 5 days.

December Precipitation Trends in Castellsera

The chart displays monthly precipitation patterns in Castellsera, 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 Castellsera, December typically receives around 24 mm (0.9 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec332546625145225336684724
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Castellsera

In Castellsera in December humidity is 79%. With an average temperature of 7°C (45°F), this humidity feels like a damp chill wrapping around you, making outdoor explorations uncomfortable and requiring extra layers for warmth while you navigate through the misty air.

December Average Humidity in Castellsera

This chart illustrates the average monthly humidity levels in Castellsera, 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 Castellsera is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec79%74%71%69%66%65%64%64%68%77%79%79%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Castellsera

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

Maximum UV Index Levels in Castellsera for December

The chart shows the monthly maximum UV Index (UVI) for Castellsera 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 Castellsera typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34589111098632
Data source: Castellsera 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 Castellsera Compares to Other Months

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

This table compares monthly weather conditions in Castellsera, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)33 mm (1.3 inches)79%moderate
February Weather9°C (48°F)25 mm (1.0 inches)74%moderate
March Weather11°C (52°F)46 mm (1.8 inches)71%moderate
April Weather14°C (57°F)62 mm (2.4 inches)69%very high
May Weather19°C (66°F)51 mm (2.0 inches)66%very high
June Weather23°C (73°F)45 mm (1.8 inches)65%extreme
July Weather26°C (79°F)22 mm (0.9 inches)64%very high
August Weather26°C (79°F)52 mm (2.1 inches)64%very high
September Weather21°C (70°F)36 mm (1.4 inches)68%very high
October Weather16°C (61°F)68 mm (2.7 inches)77%high
November Weather10°C (50°F)47 mm (1.9 inches)79%moderate
December Weather7°C (45°F)24 mm (0.9 inches)79%low

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