January Weather in Greenville, United States

Last updated: June 24, 2025

In January, the average temperature in Greenville, United States hovers around 1°C (34°F), with potential extremes ranging from a chilly -20°C (-4°F) to a balmy 20°C (67°F). Expect approximately 65 mm (2.5 in) of precipitation over 8 days, combined with an average humidity of 84%, creating a moist and cool environment.

January Temperature in Greenville

In January in Greenville, the average temperature is 1°C (34°F). The maximum can reach 20°C (67°F), and the minimum can be as low as -20°C (-4°F). Be prepared for a wide range of temperatures while traveling, and pack accordingly!

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

The chart illustrates January 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, January typically has an average temperature of 1°C (34°F), with highs reaching up to 20°C (67°F) and lows dropping to around -20°C (-4°F).

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

January Precipitation in Greenville

In Greenville in January, the precipitation amount is 65 mm (2.5 in) over a span of 8 days.

January Precipitation Trends in Greenville

The chart displays monthly precipitation patterns in Greenville, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Greenville, January typically receives around 65 mm (2.5 inches) of precipitation spread over approximately 8 days.

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

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Millimeters (mm) Inches (in)

January Humidity in Greenville

In Greenville in January humidity is 84%. With an average temperature of 1°C (34°F), this humidity feels like a biting chill that seeps into your bones, making travel uncomfortable and requiring extra layers to keep warm while navigating the damp air.

January Average Humidity in Greenville

This chart illustrates the average monthly humidity levels in Greenville, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Greenville is approximately 84%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Greenville

In Greenville in January, 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 January

The chart shows the monthly maximum UV Index (UVI) for Greenville in January, 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 January, the maximum UV index in Greenville typically reaches 3, which falls under the moderate exposure category.

Data source: Greenville January 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 January 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 January’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 January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	1°C (34°F)	65 mm (2.5 inches)	84%	moderate
February Weather	4°C (40°F)	101 mm (4.0 inches)	84%	high
March Weather	7°C (45°F)	73 mm (2.9 inches)	84%	very high
April Weather	12°C (54°F)	114 mm (4.5 inches)	82%	very high
May Weather	17°C (63°F)	125 mm (4.9 inches)	82%	extreme
June Weather	21°C (70°F)	90 mm (3.5 inches)	83%	extreme
July Weather	24°C (76°F)	59 mm (2.3 inches)	79%	extreme
August Weather	23°C (73°F)	108 mm (4.2 inches)	77%	very high
September Weather	20°C (68°F)	101 mm (4.0 inches)	75%	very high
October Weather	14°C (58°F)	108 mm (4.2 inches)	81%	high
November Weather	6°C (43°F)	76 mm (3.0 inches)	87%	moderate
December Weather	4°C (39°F)	89 mm (3.5 inches)	85%	moderate