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December Weather in Illano, Spain

Last updated: August 27, 2025

In Illano, Spain, the average temperature in December hovers around 7°C (45°F), with a minimum of -2°C (28°F) and a maximum of 17°C (64°F). Expect a precipitation amount of 202 mm (8.0 in) over approximately 17 days, contributing to an average humidity of 87%. Be prepared for a cool and damp climate!

December Temperature in Illano

In December in Illano, the average temperature is 7°C (45°F). Maximums can reach 17°C (64°F), while minimums can drop to as low as -2°C (28°F). Be sure to pack layers to stay comfortable during your travels.

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

The chart illustrates December temperature patterns in Illano, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Illano, December typically has an average temperature of 7°C (45°F), with highs reaching up to 17°C (64°F) and lows dropping to around -2°C (28°F).
JanFebMarAprMayJunJulAugSepOctNovDec414546495559636360544745
Data source: Temperature data for Illano 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 Illano

In Illano in December, the precipitation amount is 202 mm (8.0 in) over a span of 17 days.

December Precipitation Trends in Illano

The chart displays monthly precipitation patterns in Illano, 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 Illano, December typically receives around 202 mm (8.0 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec109128126103123117626677117165202
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Illano

In Illano in December, humidity is 87%. With an average temperature of 7°C (45°F), this humidity feels like a damp chill that seeps into your bones, making outdoor adventures somewhat uncomfortable and urging travelers to seek refuge in cozy cafes or warm indoor activities.

December Average Humidity in Illano

This chart illustrates the average monthly humidity levels in Illano, 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 Illano 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 Illano

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

Maximum UV Index Levels in Illano for December

The chart shows the monthly maximum UV Index (UVI) for Illano 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 Illano typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24689111098632
Data source: Illano 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 Illano Compares to Other Months

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

This table compares monthly weather conditions in Illano, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)109 mm (4.3 inches)87%low
February Weather7°C (45°F)128 mm (5.1 inches)85%moderate
March Weather8°C (46°F)126 mm (4.9 inches)83%high
April Weather10°C (50°F)103 mm (4.0 inches)83%very high
May Weather13°C (55°F)123 mm (4.9 inches)84%very high
June Weather15°C (59°F)117 mm (4.6 inches)84%extreme
July Weather17°C (63°F)62 mm (2.4 inches)86%very high
August Weather17°C (63°F)66 mm (2.6 inches)78%very high
September Weather16°C (60°F)77 mm (3.0 inches)77%very high
October Weather12°C (55°F)117 mm (4.6 inches)82%high
November Weather8°C (47°F)165 mm (6.5 inches)86%moderate
December Weather7°C (45°F)202 mm (8.0 inches)87%low

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