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December Weather in Castello, Italy

Last updated: August 23, 2025

In December, the average temperature in Castello, Italy hovers around 5°C (42°F), with a chilly minimum of -2°C (28°F) and a mild maximum of 13°C (56°F). Expect wet conditions, with 87 mm (3.4 in) of precipitation spread over 9 days. The average humidity during this month is a high 85%, creating a damp and cool atmosphere.

December Temperature in Castello

In December in Castello, the average temperature is 5°C (42°F), with maximums reaching 13°C (56°F) and minimums dropping as low as -2°C (28°F). It's a chilly time to visit, so be sure to pack warm clothing for your travels.

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

The chart illustrates December temperature patterns in Castello, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castello, December typically has an average temperature of 5°C (42°F), with highs reaching up to 13°C (56°F) and lows dropping to around -2°C (28°F).
JanFebMarAprMayJunJulAugSepOctNovDec404348556372757668595042
Data source: Temperature data for Castello 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 Castello

In Castello in December, the precipitation amount is 87 mm (3.4 in), occurring over a span of 9 days.

December Precipitation Trends in Castello

The chart displays monthly precipitation patterns in Castello, 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 Castello, December typically receives around 87 mm (3.4 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec2653609612110110110411910213587
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Castello

In Castello in December, humidity is 85%. With an average temperature of 5°C (42°F), this humidity feels like a damp chill that clings to your skin, making outdoor activities uncomfortable and requiring extra layers to stay warm while exploring.

December Average Humidity in Castello

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

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

Maximum UV Index Levels in Castello for December

The chart shows the monthly maximum UV Index (UVI) for Castello 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 Castello typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235789987532
Data source: Castello 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 Castello Compares to Other Months

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

This table compares monthly weather conditions in Castello, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (40°F)26 mm (1.0 inches)87%low
February Weather6°C (43°F)52 mm (2.1 inches)79%moderate
March Weather9°C (48°F)60 mm (2.3 inches)69%moderate
April Weather13°C (55°F)96 mm (3.8 inches)71%high
May Weather17°C (63°F)121 mm (4.8 inches)70%very high
June Weather22°C (73°F)101 mm (4.0 inches)65%very high
July Weather24°C (76°F)101 mm (4.0 inches)61%very high
August Weather25°C (76°F)104 mm (4.1 inches)54%very high
September Weather20°C (68°F)119 mm (4.7 inches)66%high
October Weather15°C (59°F)102 mm (4.0 inches)83%moderate
November Weather10°C (50°F)135 mm (5.3 inches)88%moderate
December Weather5°C (42°F)87 mm (3.4 inches)85%low

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