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December Weather in Etna, United States

Last updated: June 24, 2025

In Etna, United States, the average temperature in December hovers around 1°C (34°F). Expect chilly nights with minimum temperatures plunging to -10°C (15°F), while daytime highs can reach a pleasant 15°C (60°F). The month is characterized by 120 mm (4.7 in) of precipitation spread over approximately 11 days, contributing to an average humidity level of 86%. Be prepared for a mix of wet and cool weather this season!

December Temperature in Etna

In December in Etna, the average temperature is 1°C (34°F), with maximums potentially reaching 15°C (60°F) and minimums dipping as low as -10°C (15°F). Travelers should be prepared for chilly conditions and varying temperatures, making layered clothing essential for comfort.

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

The chart illustrates December temperature patterns in Etna, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Etna, December typically has an average temperature of 1°C (34°F), with highs reaching up to 15°C (60°F) and lows dropping to around -10°C (15°F).
JanFebMarAprMayJunJulAugSepOctNovDec353639455362716961504034
Data source: Temperature data for Etna 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 Etna

In Etna in December, the precipitation amount is 120 mm (4.7 in) during a span of 11 days.

December Precipitation Trends in Etna

The chart displays monthly precipitation patterns in Etna, 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 Etna, December typically receives around 120 mm (4.7 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec161147120816320811224696120
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Etna

In Etna in December, humidity is 86%. With an average temperature of 1°C (34°F), this humidity feels like a chilling embrace, making outdoor adventures brisk and invigorating but challenging for travel.

December Average Humidity in Etna

This chart illustrates the average monthly humidity levels in Etna, 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 Etna is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%85%85%82%81%79%70%60%62%72%87%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Etna

In Etna in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Etna, you can check the information here.

Maximum UV Index Levels in Etna for December

The chart shows the monthly maximum UV Index (UVI) for Etna 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 Etna typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3589111111109643
Data source: Etna 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 Etna Compares to Other Months

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

This table compares monthly weather conditions in Etna, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (35°F)161 mm (6.3 inches)86%moderate
February Weather2°C (36°F)147 mm (5.8 inches)85%moderate
March Weather4°C (39°F)120 mm (4.7 inches)85%very high
April Weather7°C (46°F)81 mm (3.2 inches)82%very high
May Weather12°C (53°F)63 mm (2.5 inches)81%extreme
June Weather17°C (62°F)20 mm (0.8 inches)79%extreme
July Weather22°C (71°F)8 mm (0.3 inches)70%extreme
August Weather21°C (69°F)11 mm (0.4 inches)60%very high
September Weather16°C (61°F)22 mm (0.9 inches)62%very high
October Weather10°C (50°F)46 mm (1.8 inches)72%high
November Weather4°C (40°F)96 mm (3.8 inches)87%moderate
December Weather1°C (34°F)120 mm (4.7 inches)86%moderate

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