December Weather in Greenville, United States

Last updated: June 24, 2025

In Greenville, United States, the average temperature in December hovers around 10°C (50°F). Expect a chilly minimum of -5°C (23°F) and a warm maximum of 24°C (76°F). Precipitation averages 131 mm (5.2 in) over 12 days, while humidity remains high at 89%. Be prepared for a mix of cool and rainy days!

December Temperature in Greenville

In December in Greenville, the average temperature is 10°C (50°F). The maximum can reach 24°C (76°F), while the minimum can drop as low as -5°C (23°F). Travelers should prepare for a range of temperatures, ensuring they pack layers for both warmer days and cooler nights.

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 10°C (50°F), with highs reaching up to 24°C (76°F) and lows dropping to around -5°C (23°F).

Data source: Temperature data for Greenville generated using information from the Copernicus Climate Change Service.

December Precipitation in Greenville

In Greenville in December, the precipitation amount is 131 mm (5.2 in) spread over 12 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 131 mm (5.2 inches) of precipitation spread over approximately 12 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

December Humidity in Greenville

In Greenville in December, humidity is 89%. With an average temperature of 10°C (50°F), this humidity feels like a dense blanket wrapping around you, making travel feel damp and chilly, and urging you to dress in layers for comfort.

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 89%, offering insight into how humid the weather typically is during this month.

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.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	9°C (48°F)	107 mm (4.2 inches)	86%	moderate
February Weather	12°C (54°F)	128 mm (5.0 inches)	84%	high
March Weather	14°C (58°F)	99 mm (3.9 inches)	83%	very high
April Weather	17°C (64°F)	107 mm (4.2 inches)	81%	very high
May Weather	22°C (72°F)	99 mm (3.9 inches)	81%	extreme
June Weather	25°C (77°F)	117 mm (4.6 inches)	81%	extreme
July Weather	26°C (80°F)	107 mm (4.2 inches)	83%	extreme
August Weather	26°C (79°F)	127 mm (5.0 inches)	81%	extreme
September Weather	24°C (76°F)	104 mm (4.1 inches)	82%	very high
October Weather	20°C (68°F)	106 mm (4.2 inches)	78%	very high
November Weather	12°C (54°F)	78 mm (3.1 inches)	86%	high
December Weather	10°C (50°F)	131 mm (5.2 inches)	89%	moderate