September Weather in Greenville, United States

Last updated: June 24, 2025

In September, the average temperature in Greenville, United States hovers around 14°C (58°F). Expect the mercury to dip as low as 0°C (32°F) and rise to a comfortable 30°C (87°F). During this time, rainfall averages 80 mm (3.2 in) spread across 8 days, contributing to a moderate humidity level of 77%. Enjoy the diverse weather as the season unfolds!

September Temperature in Greenville

In September in Greenville, the average temperature is 14°C (58°F). Maximum temperatures can reach up to 30°C (87°F), while minimums can drop as low as 0°C (32°F). Be prepared for a range of weather conditions during your travels, making it wise to pack layers.

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

The chart illustrates September 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, September typically has an average temperature of 14°C (58°F), with highs reaching up to 30°C (87°F) and lows dropping to around 0°C (32°F).

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

September Precipitation in Greenville

In Greenville in September, the total precipitation amount is 80 mm (3.2 in), occurring over a span of 8 days.

September Precipitation Trends in Greenville

The chart displays monthly precipitation patterns in Greenville, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Greenville, September typically receives around 80 mm (3.2 inches) of precipitation spread over approximately 8 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Greenville

In Greenville in September, humidity is 77%. With an average temperature of 14°C (58°F), this humidity feels like a warm blanket wrapping around you, making traveling feel sticky and heavy, yet still manageable as you explore the sights.

September Average Humidity in Greenville

This chart illustrates the average monthly humidity levels in Greenville, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Greenville is approximately 77%, offering insight into how humid the weather typically is during this month.

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

September UV Index in Greenville

In Greenville in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Greenville.

Maximum UV Index Levels in Greenville for September

The chart shows the monthly maximum UV Index (UVI) for Greenville in September, 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 September, the maximum UV index in Greenville typically reaches 7, which falls under the high exposure category.

Data source: Greenville September 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 September 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 September’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 September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-9°C (16°F)	86 mm (3.4 inches)	88%	low
February Weather	-8°C (19°F)	82 mm (3.2 inches)	88%	moderate
March Weather	-4°C (26°F)	75 mm (3.0 inches)	85%	moderate
April Weather	3°C (38°F)	115 mm (4.5 inches)	81%	very high
May Weather	10°C (51°F)	98 mm (3.9 inches)	76%	very high
June Weather	16°C (61°F)	86 mm (3.4 inches)	74%	very high
July Weather	19°C (67°F)	103 mm (4.0 inches)	74%	very high
August Weather	19°C (66°F)	88 mm (3.5 inches)	74%	very high
September Weather	14°C (58°F)	80 mm (3.2 inches)	77%	high
October Weather	8°C (47°F)	124 mm (4.9 inches)	82%	moderate
November Weather	0°C (33°F)	106 mm (4.2 inches)	85%	moderate
December Weather	-6°C (21°F)	101 mm (4.0 inches)	84%	low