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December Weather in Summersville, United States

Last updated: June 24, 2025

In December, the average temperature in Summersville, United States hovers around 6°C (43°F). Expect a chilly minimum of -11°C (12°F) and a comfortable maximum of 22°C (72°F). During this month, you'll encounter 144 mm (5.7 in) of precipitation spread over 10 days, contributing to an overall average humidity of 88%. Stay prepared for a blend of cool days and soggy weather!

December Temperature in Summersville

In December in Summersville, the average temperature is 6°C (43°F). Maximums can reach 22°C (72°F), while minimums can drop as low as -11°C (12°F). It's advisable to pack layers to stay comfortable during your travels.

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

The chart illustrates December temperature patterns in Summersville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Summersville, December typically has an average temperature of 6°C (43°F), with highs reaching up to 22°C (72°F) and lows dropping to around -11°C (12°F).
JanFebMarAprMayJunJulAugSepOctNovDec384350576875797772624643
Data source: Temperature data for Summersville 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 Summersville

In Summersville in December, the precipitation amount is 144 mm (5.7 in) over a duration of 10 days.

December Precipitation Trends in Summersville

The chart displays monthly precipitation patterns in Summersville, 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 Summersville, December typically receives around 144 mm (5.7 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec10017913914311516112411112212588144
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Summersville

In Summersville in December, humidity is 88%. With an average temperature of 6°C (43°F), this humidity feels like a damp chill that seeps into your bones, making traveling uncomfortable and prompting you to seek warm shelter frequently.

December Average Humidity in Summersville

This chart illustrates the average monthly humidity levels in Summersville, 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 Summersville is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%86%86%82%83%83%80%74%71%78%88%88%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Summersville

In Summersville 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 Summersville, you can check the information here.

Maximum UV Index Levels in Summersville for December

The chart shows the monthly maximum UV Index (UVI) for Summersville 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 Summersville typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3679101111109753
Data source: Summersville 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 Summersville Compares to Other Months

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

This table compares monthly weather conditions in Summersville, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (38°F)100 mm (3.9 inches)87%moderate
February Weather6°C (43°F)179 mm (7.0 inches)86%high
March Weather10°C (50°F)139 mm (5.5 inches)86%high
April Weather14°C (58°F)143 mm (5.6 inches)82%very high
May Weather20°C (69°F)115 mm (4.5 inches)82%very high
June Weather24°C (75°F)161 mm (6.4 inches)83%extreme
July Weather26°C (79°F)124 mm (4.9 inches)80%extreme
August Weather25°C (77°F)111 mm (4.4 inches)74%very high
September Weather22°C (72°F)122 mm (4.8 inches)71%very high
October Weather16°C (62°F)125 mm (4.9 inches)78%high
November Weather8°C (47°F)88 mm (3.5 inches)88%moderate
December Weather6°C (43°F)144 mm (5.7 inches)88%moderate

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