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December Weather in Greenville, United States

Last updated: June 24, 2025

In December, the average temperature in Greenville, United States hovers around 12°C (53°F). Expect a range from a chilly -5°C (23°F) to a warm 27°C (81°F). During this month, precipitation averages 133 mm (5.2 in) spread over 11 days, contributing to an overall average humidity of 86%. Stay prepared for varying weather conditions!

December Temperature in Greenville

In December in Greenville, the average temperature is 12°C (53°F). The maximum can reach 27°C (81°F), while the minimum can drop as low as -5°C (23°F). This variability suggests that travelers should be prepared for a wide range of temperatures and pack accordingly.

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 12°C (53°F), with highs reaching up to 27°C (81°F) and lows dropping to around -5°C (23°F).
JanFebMarAprMayJunJulAugSepOctNovDec505761667479818178705753
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 133 mm (5.2 in) spread over a period 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 133 mm (5.2 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec1061199912111913611612510710769133
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 86%. With an average temperature of 12°C (53°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less enjoyable and prompting the need for warm, layered clothing while exploring the surroundings.

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 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%82%79%77%74%70%78%78%79%74%83%86%
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 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 Greenville for better planning.

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 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec589111111121110864
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 Weather10°C (50°F)106 mm (4.2 inches)83%moderate
February Weather14°C (57°F)119 mm (4.7 inches)82%very high
March Weather16°C (62°F)98 mm (3.9 inches)79%very high
April Weather19°C (66°F)121 mm (4.8 inches)77%extreme
May Weather23°C (74°F)119 mm (4.7 inches)74%extreme
June Weather26°C (79°F)136 mm (5.3 inches)70%extreme
July Weather27°C (81°F)116 mm (4.6 inches)78%extreme
August Weather27°C (81°F)125 mm (4.9 inches)78%extreme
September Weather25°C (78°F)107 mm (4.2 inches)79%very high
October Weather21°C (71°F)107 mm (4.2 inches)74%very high
November Weather14°C (57°F)69 mm (2.7 inches)83%high
December Weather12°C (53°F)133 mm (5.2 inches)86%moderate

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