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December Weather in Greeneville, United States

Last updated: June 24, 2025

In December, the average temperature in Greeneville, United States hovers around 6°C (42°F). Expect a wide temperature range, with minimums dipping to -11°C (13°F) and maximums reaching up to 22°C (71°F). This month brings 127 mm (5.0 in) of precipitation over about 12 days, along with a high average humidity of 88%. Prepare for a mix of chilly and mild days as you enjoy the varied climate!

December Temperature in Greeneville

In December in Greeneville, the average temperature is 6°C (42°F). The maximum can reach 22°C (71°F), while the minimum can be as low as -11°C (13°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

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

The chart illustrates December temperature patterns in Greeneville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Greeneville, December typically has an average temperature of 6°C (42°F), with highs reaching up to 22°C (71°F) and lows dropping to around -11°C (13°F).
JanFebMarAprMayJunJulAugSepOctNovDec394449576672757470604642
Data source: Temperature data for Greeneville 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 Greeneville

In Greeneville in December, the precipitation amount is 127 mm (5.0 in) occurring over the course of 12 days.

December Precipitation Trends in Greeneville

The chart displays monthly precipitation patterns in Greeneville, 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 Greeneville, December typically receives around 127 mm (5.0 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec93148130137129115931139012079127
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Greeneville

In Greeneville in December, humidity is 88%. With an average temperature of 6°C (42°F), this humidity feels like a damp chill that seeps into your bones, making traveling uncomfortable as the cold air clings to your skin and saps your energy.

December Average Humidity in Greeneville

This chart illustrates the average monthly humidity levels in Greeneville, 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 Greeneville is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%87%84%84%83%79%66%67%76%89%88%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Greeneville

In Greeneville 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 Greeneville, you can check the information here.

Maximum UV Index Levels in Greeneville for December

The chart shows the monthly maximum UV Index (UVI) for Greeneville 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 Greeneville typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36810111111109753
Data source: Greeneville 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 Greeneville Compares to Other Months

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

This table compares monthly weather conditions in Greeneville, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (39°F)93 mm (3.6 inches)88%moderate
February Weather7°C (45°F)148 mm (5.8 inches)88%high
March Weather10°C (50°F)130 mm (5.1 inches)87%very high
April Weather14°C (57°F)137 mm (5.4 inches)84%very high
May Weather19°C (66°F)129 mm (5.1 inches)84%extreme
June Weather22°C (72°F)115 mm (4.5 inches)83%extreme
July Weather24°C (76°F)93 mm (3.7 inches)79%extreme
August Weather23°C (74°F)113 mm (4.4 inches)66%very high
September Weather21°C (70°F)90 mm (3.6 inches)67%very high
October Weather16°C (61°F)120 mm (4.7 inches)76%high
November Weather8°C (46°F)79 mm (3.1 inches)89%moderate
December Weather6°C (42°F)127 mm (5.0 inches)88%moderate

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