January Weather in Greenville, United States

Last updated: June 24, 2025

In January, the average temperature in Greenville, United States is a chilly 2°C (36°F). While you might experience some brisk days with minimums dropping to -17°C (1°F), the mercury can rise to a pleasant 20°C (69°F). Expect about 90 mm (3.5 in) of precipitation over an average of 8 days, coupled with a high average humidity of 83%. Stay prepared for the elements!

January Temperature in Greenville

In January in Greenville, the average temperature is 2°C (36°F). Maximums can reach 20°C (69°F), while minimums can dip as low as -17°C (1°F). Be prepared for a wide range of temperatures if you're traveling during this month.

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 2°C (36°F), with highs reaching up to 20°C (69°F) and lows dropping to around -17°C (1°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 90 mm (3.5 in) spread over 8 days, indicating a relatively wet period for the region.

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 90 mm (3.5 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 83%. With an average temperature of 2°C (36°F), this humidity feels like a cold, damp blanket, making travel uncomfortable as the chill seeps into your bones and the moisture clings to your clothing, forcing you to constantly seek warmth and shelter.

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 83%, 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	2°C (36°F)	90 mm (3.5 inches)	83%	moderate
February Weather	4°C (39°F)	113 mm (4.4 inches)	81%	high
March Weather	9°C (49°F)	152 mm (6.0 inches)	80%	high
April Weather	13°C (56°F)	158 mm (6.2 inches)	80%	very high
May Weather	19°C (67°F)	172 mm (6.8 inches)	83%	very high
June Weather	24°C (76°F)	87 mm (3.4 inches)	83%	extreme
July Weather	26°C (80°F)	105 mm (4.2 inches)	76%	extreme
August Weather	25°C (77°F)	104 mm (4.1 inches)	69%	very high
September Weather	23°C (73°F)	70 mm (2.7 inches)	68%	very high
October Weather	15°C (60°F)	132 mm (5.2 inches)	72%	high
November Weather	7°C (46°F)	79 mm (3.1 inches)	83%	moderate
December Weather	5°C (41°F)	80 mm (3.1 inches)	86%	moderate