nomadseason

December Weather in Greenville, United States

Last updated: June 24, 2025

In Greenville, United States, the average temperature in December is a crisp 9°C (49°F). Expect a wide range, with minimums dipping to -8°C (17°F) and maximums soaring to 25°C (77°F). During this month, you can anticipate 105 mm (4.1 in) of precipitation over approximately 10 days, coupled with a high average humidity of 84%. This mix of temperatures and moisture makes for a uniquely dynamic climate!

December Temperature in Greenville

In December in Greenville, the average temperature is 9°C (49°F). Maximum can reach 25°C (77°F) and minimum can be as low as -8°C (17°F). It's a month of contrasts, so be sure to pack both warm and light clothing 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 9°C (49°F), with highs reaching up to 25°C (77°F) and lows dropping to around -8°C (17°F).
JanFebMarAprMayJunJulAugSepOctNovDec455054637177807975665348
Data source: Temperature data for Greenville generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
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 105 mm (4.1 in) over the course 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 105 mm (4.1 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec868969991131331381611337396105
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Greenville

In Greenville in December, humidity is 84%. With an average temperature of 9°C (49°F), this humidity feels like a chilly embrace, making travel uncomfortable as the dampness seeps into your clothes and lingers in the air, leaving you feeling cool yet clammy.

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 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%81%80%80%81%82%83%83%80%80%83%84%
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.
JanFebMarAprMayJunJulAugSepOctNovDec46810111111109853
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 Weather7°C (45°F)86 mm (3.4 inches)84%moderate
February Weather10°C (50°F)89 mm (3.5 inches)81%high
March Weather12°C (54°F)69 mm (2.7 inches)80%very high
April Weather17°C (63°F)99 mm (3.9 inches)80%very high
May Weather21°C (71°F)113 mm (4.4 inches)81%extreme
June Weather25°C (77°F)133 mm (5.2 inches)82%extreme
July Weather27°C (80°F)138 mm (5.4 inches)83%extreme
August Weather26°C (79°F)161 mm (6.3 inches)82%very high
September Weather24°C (75°F)133 mm (5.2 inches)80%very high
October Weather19°C (67°F)72 mm (2.9 inches)79%very high
November Weather12°C (54°F)96 mm (3.8 inches)83%moderate
December Weather9°C (49°F)105 mm (4.1 inches)84%moderate

Compare Greenville's Climate with Cities Worldwide