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December Weather in Castelmassa, Italy

Last updated: August 23, 2025

In December, the average temperature in Castelmassa, Italy hovers around 5°C (41°F), with a minimum of -3°C (26°F) and a maximum reaching 14°C (58°F). Expect 71 mm (2.8 in) of precipitation spread over approximately 8 days, while the air remains quite humid, with an average of 85% humidity.

December Temperature in Castelmassa

In December in Castelmassa, the average temperature is 5°C (41°F), with a maximum that can reach 14°C (58°F) and a minimum that can drop as low as -3°C (26°F). Be sure to pack layers and stay warm while enjoying your travels in this chilly, yet beautiful destination!

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

The chart illustrates December temperature patterns in Castelmassa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castelmassa, December typically has an average temperature of 5°C (41°F), with highs reaching up to 14°C (58°F) and lows dropping to around -3°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec394550586676797970615141
Data source: Temperature data for Castelmassa 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 Castelmassa

In Castelmassa in December, the precipitation amount is 71 mm (2.8 in) over the course of 8 days.

December Precipitation Trends in Castelmassa

The chart displays monthly precipitation patterns in Castelmassa, 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 Castelmassa, December typically receives around 71 mm (2.8 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec2457507912066102871217311771
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Castelmassa

In Castelmassa in December, humidity is 85%. With an average temperature of 5°C (41°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration a challenge as the cold air clings to your skin.

December Average Humidity in Castelmassa

This chart illustrates the average monthly humidity levels in Castelmassa, 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 Castelmassa is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%79%69%71%70%65%61%54%66%83%88%85%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Castelmassa

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

Maximum UV Index Levels in Castelmassa for December

The chart shows the monthly maximum UV Index (UVI) for Castelmassa 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 Castelmassa typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689986532
Data source: Castelmassa 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 Castelmassa Compares to Other Months

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

This table compares monthly weather conditions in Castelmassa, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (39°F)24 mm (0.9 inches)87%low
February Weather7°C (45°F)57 mm (2.2 inches)79%moderate
March Weather10°C (50°F)50 mm (2.0 inches)69%moderate
April Weather15°C (58°F)79 mm (3.1 inches)71%high
May Weather19°C (66°F)120 mm (4.7 inches)70%very high
June Weather24°C (76°F)65 mm (2.6 inches)65%very high
July Weather26°C (79°F)102 mm (4.0 inches)61%very high
August Weather26°C (80°F)87 mm (3.4 inches)54%very high
September Weather21°C (70°F)121 mm (4.8 inches)66%high
October Weather16°C (61°F)73 mm (2.9 inches)83%moderate
November Weather11°C (51°F)117 mm (4.6 inches)88%moderate
December Weather5°C (41°F)71 mm (2.8 inches)85%low

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