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December Weather in Greenville, United States

Last updated: June 24, 2025

In Greenville, United States, the average temperature in December hovers around 6°C (43°F). Expect a chilly minimum of -12°C (10°F) and a pleasant maximum of 23°C (74°F). Precipitation is notably present, with 108 mm (4.3 in) spread over 11 days, and the air feels quite humid, averaging around 88%. Prepare accordingly for a variety of weather conditions!

December Temperature in Greenville

In December in Greenville, the average temperature is 6°C (43°F). Maximums can reach 23°C (74°F), while minimums can dip as low as -12°C (10°F). Be prepared for a wide range of temperatures, ensuring you pack layers for your trip.

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

The chart illustrates December temperature patterns in Greenville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Greenville, December typically has an average temperature of 6°C (43°F), with highs reaching up to 23°C (74°F) and lows dropping to around -12°C (10°F).
JanFebMarAprMayJunJulAugSepOctNovDec374250586977807873624743
Data source: Temperature data for Greenville 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 Greenville

In Greenville in December, the precipitation amount is 108 mm (4.3 in) over the course of 11 days.

December Precipitation Trends in Greenville

The chart displays monthly precipitation patterns in Greenville, 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 Greenville, December typically receives around 108 mm (4.3 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec921501231511201271081029910985109
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Greenville

In Greenville 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 Greenville

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

In Greenville 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 Greenville, you can check the information here.

Maximum UV Index Levels in Greenville for December

The chart shows the monthly maximum UV Index (UVI) for Greenville 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 Greenville typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710101110109753
Data source: Greenville 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 Greenville Compares to Other Months

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

This table compares monthly weather conditions in Greenville, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (38°F)91 mm (3.6 inches)87%moderate
February Weather5°C (42°F)150 mm (5.9 inches)86%high
March Weather10°C (51°F)123 mm (4.8 inches)86%high
April Weather14°C (58°F)151 mm (5.9 inches)82%very high
May Weather21°C (70°F)120 mm (4.7 inches)82%very high
June Weather25°C (77°F)127 mm (5.0 inches)83%extreme
July Weather27°C (81°F)108 mm (4.3 inches)80%very high
August Weather26°C (78°F)102 mm (4.0 inches)74%very high
September Weather23°C (74°F)99 mm (3.9 inches)71%very high
October Weather17°C (62°F)109 mm (4.3 inches)78%high
November Weather8°C (47°F)85 mm (3.3 inches)88%moderate
December Weather6°C (43°F)108 mm (4.3 inches)88%moderate

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