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December Weather in Illas, Spain

Last updated: August 27, 2025

In December, the average temperature in Illas, Spain hovers around 10°C (51°F). You can expect minimum temperatures dropping to 3°C (37°F) and maximums reaching up to 19°C (67°F). During this period, precipitation totals about 186 mm (7.3 in) across 17 days, with an average humidity of a muggy 87%.

December Temperature in Illas

In December in Illas, the average temperature is 10°C (51°F). Maximums can reach 19°C (67°F), while minimums can drop to as low as 3°C (37°F). Be prepared for a range of temperatures and pack accordingly for your travels.

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

The chart illustrates December temperature patterns in Illas, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Illas, December typically has an average temperature of 10°C (51°F), with highs reaching up to 19°C (67°F) and lows dropping to around 3°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec475051535761656663595351
Data source: Temperature data for Illas 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 Illas

In Illas in December, the precipitation amount is 186 mm (7.3 in), occurring over the course of 17 days.

December Precipitation Trends in Illas

The chart displays monthly precipitation patterns in Illas, 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 Illas, December typically receives around 186 mm (7.3 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec1091139698106125788490125179186
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Illas

In Illas in December humidity is 87%. With an average temperature of 10°C (51°F), this humidity feels like a heavy blanket enveloping you, making outdoor activities uncomfortable and sticky, and often requiring frequent breaks to stay hydrated and cool.

December Average Humidity in Illas

This chart illustrates the average monthly humidity levels in Illas, 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 Illas is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%85%83%83%84%84%86%78%77%82%86%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Illas

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

Maximum UV Index Levels in Illas for December

The chart shows the monthly maximum UV Index (UVI) for Illas 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 Illas typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2457910997532
Data source: Illas 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 Illas Compares to Other Months

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

This table compares monthly weather conditions in Illas, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (48°F)109 mm (4.3 inches)87%low
February Weather10°C (50°F)113 mm (4.5 inches)85%moderate
March Weather10°C (51°F)96 mm (3.8 inches)83%moderate
April Weather12°C (53°F)98 mm (3.9 inches)83%high
May Weather14°C (58°F)106 mm (4.2 inches)84%very high
June Weather16°C (62°F)125 mm (4.9 inches)84%very high
July Weather18°C (65°F)78 mm (3.1 inches)86%very high
August Weather19°C (66°F)84 mm (3.3 inches)78%very high
September Weather17°C (64°F)90 mm (3.5 inches)77%high
October Weather15°C (59°F)125 mm (4.9 inches)82%moderate
November Weather11°C (53°F)179 mm (7.1 inches)86%moderate
December Weather10°C (51°F)186 mm (7.3 inches)87%low

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