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December Weather in La Union, Spain

Last updated: August 27, 2025

In December, the average temperature in La Union, Spain hovers around 15°C (59°F). Temperatures can dip as low as 9°C (48°F), while reaching a maximum of 19°C (66°F). Expect about 20 mm (0.8 in) of precipitation over 2 days, contributing to an average humidity level of 74%.

December Temperature in La Union

In December in La Union, the average temperature is 15°C (59°F). Maximums can reach 19°C (66°F), while minimums can dip as low as 9°C (48°F). This mild weather makes La Union an ideal destination for travelers seeking comfortable conditions to explore.

December Weather in La Union: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in La Union, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In La Union, December typically has an average temperature of 15°C (59°F), with highs reaching up to 19°C (66°F) and lows dropping to around 9°C (48°F).
JanFebMarAprMayJunJulAugSepOctNovDec565758606571767875706359
Data source: Temperature data for La Union 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 La Union

In La Union in December, the precipitation amount is 20 mm (0.8 in) over the course of 2 days.

December Precipitation Trends in La Union

The chart displays monthly precipitation patterns in La Union, 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 La Union, December typically receives around 20 mm (0.8 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec489444418911049324320
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in La Union

In La Union in December, humidity is 74%. With an average temperature of 15°C (59°F), this humidity feels like traveling through a warm, sticky blanket that clings to your skin, making outdoor activities a bit uncomfortable and prompting you to seek out shaded areas or cool breezes.

December Average Humidity in La Union

This chart illustrates the average monthly humidity levels in La Union, 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 La Union is approximately 74%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec72%71%69%66%64%65%71%69%70%74%72%74%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in La Union

In La Union 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 La Union, you can check the information here.

Maximum UV Index Levels in La Union for December

The chart shows the monthly maximum UV Index (UVI) for La Union 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 La Union typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356810111198743
Data source: La Union 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 La Union Compares to Other Months

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

This table compares monthly weather conditions in La Union, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather13°C (56°F)48 mm (1.9 inches)72%moderate
February Weather14°C (57°F)9 mm (0.4 inches)71%moderate
March Weather14°C (58°F)44 mm (1.7 inches)69%high
April Weather15°C (60°F)44 mm (1.7 inches)66%very high
May Weather18°C (66°F)18 mm (0.7 inches)64%very high
June Weather22°C (71°F)9 mm (0.4 inches)65%extreme
July Weather24°C (76°F)1 mm (0.0 inches)71%extreme
August Weather26°C (79°F)10 mm (0.4 inches)69%very high
September Weather24°C (76°F)49 mm (1.9 inches)70%very high
October Weather21°C (70°F)32 mm (1.3 inches)74%high
November Weather17°C (63°F)43 mm (1.7 inches)72%moderate
December Weather15°C (59°F)20 mm (0.8 inches)74%moderate

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