January Weather in Greenville, United States

Last updated: June 24, 2025

In January, the average temperature in Greenville, United States hovers around 7°C (45°F). While you might experience minimum temperatures dipping to -17°C (2°F), it can also warm up to a comfortable 25°C (78°F). Expect moderate precipitation of about 86 mm (3.4 in) spread across 8 days, and a high average humidity of 84% to complete the picture.

January Temperature in Greenville

In January in Greenville, the average temperature is 7°C (45°F). The maximum can reach 25°C (78°F), while the minimum can drop to as low as -17°C (2°F). Travelers should be prepared for a wide range of temperatures, making layers and appropriate clothing essential for visiting during this time.

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 7°C (45°F), with highs reaching up to 25°C (78°F) and lows dropping to around -17°C (2°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 reaches 86 mm (3.4 in) over the course 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 86 mm (3.4 inches) of precipitation spread over approximately 8 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Greenville

In Greenville in January, humidity is 84%. With an average temperature of 7°C (45°F), this humidity feels like a damp chill that seeps into your bones, making travel uncomfortable and necessitating extra layers to stay warm while exploring the sights.

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 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 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 4, 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	7°C (45°F)	86 mm (3.4 inches)	84%	moderate
February Weather	10°C (50°F)	89 mm (3.5 inches)	81%	high
March Weather	12°C (54°F)	69 mm (2.7 inches)	80%	very high
April Weather	17°C (63°F)	99 mm (3.9 inches)	80%	very high
May Weather	21°C (71°F)	113 mm (4.4 inches)	81%	extreme
June Weather	25°C (77°F)	133 mm (5.2 inches)	82%	extreme
July Weather	27°C (80°F)	138 mm (5.4 inches)	83%	extreme
August Weather	26°C (79°F)	161 mm (6.3 inches)	82%	very high
September Weather	24°C (75°F)	133 mm (5.2 inches)	80%	very high
October Weather	19°C (67°F)	72 mm (2.9 inches)	79%	very high
November Weather	12°C (54°F)	96 mm (3.8 inches)	83%	moderate
December Weather	9°C (49°F)	105 mm (4.1 inches)	84%	moderate