September Weather in Greenville, United States

Last updated: June 24, 2025

In Greenville, United States, the average temperature in September is a pleasant 24°C (76°F), making it an ideal time to explore. However, temperatures can vary, with a minimum of 12°C (53°F) and a maximum of 35°C (96°F). Be prepared for some rain, as precipitation typically reaches 104 mm (4.1 in) over 9 days. With an average humidity of 82%, you might want to pack accordingly!

September Temperature in Greenville

In September in Greenville, the average temperature is 24°C (76°F). Maximums can reach 35°C (96°F), while minimums can dip as low as 12°C (53°F). This makes it a great time for travelers to enjoy pleasant weather, whether you're exploring the outdoors or enjoying cultural activities.

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 24°C (76°F), with highs reaching up to 35°C (96°F) and lows dropping to around 12°C (53°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 precipitation amount is 104 mm (4.1 in) over the course of 9 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 104 mm (4.1 inches) of precipitation spread over approximately 9 days.

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

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Millimeters (mm) Inches (in)

September Humidity in Greenville

In Greenville in September, humidity is 82%. With an average temperature of 24°C (76°F), this humidity feels like wearing a warm, damp blanket, making travel uncomfortable and sticky as you explore.

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 82%, 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 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For 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 9, which falls under the very 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 (48°F)	107 mm (4.2 inches)	86%	moderate
February Weather	12°C (54°F)	128 mm (5.0 inches)	84%	high
March Weather	14°C (58°F)	99 mm (3.9 inches)	83%	very high
April Weather	17°C (64°F)	107 mm (4.2 inches)	81%	very high
May Weather	22°C (72°F)	99 mm (3.9 inches)	81%	extreme
June Weather	25°C (77°F)	117 mm (4.6 inches)	81%	extreme
July Weather	26°C (80°F)	107 mm (4.2 inches)	83%	extreme
August Weather	26°C (79°F)	127 mm (5.0 inches)	81%	extreme
September Weather	24°C (76°F)	104 mm (4.1 inches)	82%	very high
October Weather	20°C (68°F)	106 mm (4.2 inches)	78%	very high
November Weather	12°C (54°F)	78 mm (3.1 inches)	86%	high
December Weather	10°C (50°F)	131 mm (5.2 inches)	89%	moderate