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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 5°C (41°F), with a minimum dipping as low as -14°C (8°F) and a maximum reaching up to 22°C (71°F). Expect about 106 mm (4.2 in) of precipitation spread over 10 days, coupled with an average humidity of 87%. Prepare for a chilly, damp month ahead!

December Temperature in Greenville

In December in Greenville, the average temperature is 5°C (41°F). The maximum can reach 22°C (71°F), while the minimum can drop as low as -14°C (8°F). Be prepared for a wide range of temperatures if you're planning to travel during this time.

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 5°C (41°F), with highs reaching up to 22°C (71°F) and lows dropping to around -14°C (8°F).
JanFebMarAprMayJunJulAugSepOctNovDec353948566775787671604541
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 106 mm (4.2 in) over a span of 10 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 106 mm (4.2 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec871271331371361501039711010090106
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 87%. With an average temperature of 5°C (41°F), this humidity feels like a heavy, damp blanket enveloping you, making every step seem laborious and the chill more biting, which can be quite challenging for traveling.

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 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%85%86%84%79%82%79%70%69%76%88%87%
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.
JanFebMarAprMayJunJulAugSepOctNovDec35710101110108643
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 Weather2°C (35°F)87 mm (3.4 inches)87%moderate
February Weather4°C (39°F)127 mm (5.0 inches)85%moderate
March Weather9°C (48°F)133 mm (5.2 inches)86%high
April Weather13°C (56°F)137 mm (5.4 inches)84%very high
May Weather20°C (67°F)136 mm (5.4 inches)79%very high
June Weather24°C (75°F)150 mm (5.9 inches)82%extreme
July Weather26°C (79°F)103 mm (4.0 inches)79%very high
August Weather24°C (76°F)97 mm (3.8 inches)70%very high
September Weather22°C (72°F)110 mm (4.3 inches)69%very high
October Weather16°C (60°F)100 mm (3.9 inches)76%high
November Weather7°C (45°F)89 mm (3.5 inches)88%moderate
December Weather5°C (41°F)106 mm (4.2 inches)87%moderate

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