January Weather in Greenville, United States

Last updated: June 24, 2025

In Greenville, United States, the average temperature for January hovers around -1°C (30°F), with extremes ranging from a chilly -25°C (-13°F) to a mild 18°C (65°F). Expect 74 mm (2.9 in) of precipitation spread over 8 days, creating a damp atmosphere with an average humidity of 88%. Embrace the unpredictability of the season as you experience this diverse climate!

January Temperature in Greenville

In January in Greenville, the average temperature is -1°C (30°F), with maximums reaching up to 18°C (65°F) and minimums dropping as low as -25°C (-13°F). Travelers should be prepared for a wide range of temperatures, making layering essential for comfort during their visit.

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 (30°F), with highs reaching up to 18°C (65°F) and lows dropping to around -25°C (-13°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 74 mm (2.9 in) over a period 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 74 mm (2.9 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 88%. With an average temperature of -1°C (30°F), this humidity feels like a biting chill that penetrates through your layers, making travel uncomfortable as every gust of wind becomes a sharp reminder of the cold and damp air surrounding you.

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 88%, 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 (30°F)	74 mm (2.9 inches)	88%	moderate
February Weather	0°C (33°F)	97 mm (3.8 inches)	88%	moderate
March Weather	5°C (42°F)	114 mm (4.5 inches)	87%	high
April Weather	11°C (51°F)	101 mm (4.0 inches)	85%	very high
May Weather	17°C (64°F)	141 mm (5.6 inches)	81%	very high
June Weather	22°C (72°F)	127 mm (5.0 inches)	82%	extreme
July Weather	24°C (76°F)	107 mm (4.2 inches)	81%	very high
August Weather	23°C (73°F)	100 mm (3.9 inches)	73%	very high
September Weather	20°C (69°F)	88 mm (3.5 inches)	73%	very high
October Weather	14°C (57°F)	98 mm (3.9 inches)	78%	high
November Weather	5°C (41°F)	92 mm (3.6 inches)	89%	moderate
December Weather	2°C (36°F)	82 mm (3.2 inches)	87%	moderate