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December Weather in Sicily Island, United States

Last updated: June 24, 2025

In Sicily Island, United States, the average temperature in December hovers around 12°C (54°F). Daily extremes can be striking, with a minimum of -3°C (27°F) and a maximum of 28°C (83°F). During this month, you can expect about 122 mm (4.8 in) of precipitation across 10 days, contributing to an average humidity of 88%.

December Temperature in Sicily Island

In December in Sicily Island, the average temperature is 12°C (54°F). The maximum can reach 28°C (83°F) and the minimum can be as low as -3°C (27°F). This diverse temperature range makes Sicily Island an interesting destination for travelers seeking both mild weather and a touch of winter charm.

December Weather in Sicily Island: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Sicily Island, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sicily Island, December typically has an average temperature of 12°C (54°F), with highs reaching up to 28°C (83°F) and lows dropping to around -3°C (27°F).
JanFebMarAprMayJunJulAugSepOctNovDec505463667580838280705754
Data source: Temperature data for Sicily Island 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 Sicily Island

In Sicily Island in December, the total precipitation amount reaches 122 mm (4.8 in) over the course of 10 days.

December Precipitation Trends in Sicily Island

The chart displays monthly precipitation patterns in Sicily Island, 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 Sicily Island, December typically receives around 122 mm (4.8 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec12214811114013713511811910212381122
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Sicily Island

In Sicily Island in December, humidity is 88%. With an average temperature of 12°C (54°F), this humidity feels like a thick, damp blanket, making traveling a bit uncomfortable as the air clings to your skin, causing you to sweat even in cooler weather.

December Average Humidity in Sicily Island

This chart illustrates the average monthly humidity levels in Sicily Island, 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 Sicily Island is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%83%80%81%81%78%79%79%79%77%85%88%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Sicily Island

In Sicily Island in December, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Sicily Island for better planning.

Maximum UV Index Levels in Sicily Island for December

The chart shows the monthly maximum UV Index (UVI) for Sicily Island 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 Sicily Island typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec579111112121110864
Data source: Sicily Island 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 Sicily Island Compares to Other Months

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

This table compares monthly weather conditions in Sicily Island, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (50°F)122 mm (4.8 inches)83%moderate
February Weather12°C (55°F)148 mm (5.8 inches)83%high
March Weather17°C (63°F)111 mm (4.4 inches)80%very high
April Weather19°C (66°F)140 mm (5.5 inches)81%extreme
May Weather24°C (75°F)137 mm (5.4 inches)81%extreme
June Weather27°C (80°F)135 mm (5.3 inches)78%extreme
July Weather28°C (83°F)118 mm (4.7 inches)79%extreme
August Weather28°C (83°F)119 mm (4.7 inches)79%extreme
September Weather27°C (80°F)102 mm (4.0 inches)79%very high
October Weather21°C (70°F)123 mm (4.8 inches)77%very high
November Weather14°C (57°F)81 mm (3.2 inches)85%high
December Weather12°C (54°F)122 mm (4.8 inches)88%moderate

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