nomadseason

September Weather in Greenville, United States

Last updated: June 24, 2025

In September, the average temperature in Greenville, United States hovers around 26°C (78°F). Visitors can expect temperatures to range from a cool 13°C (55°F) to a sweltering 37°C (98°F). Be prepared for about 80 mm (3.1 in) of precipitation spread over 7 days, along with a notable average humidity of 73%. Plan accordingly to make the most of your experience!

September Temperature in Greenville

In September in Greenville, the average temperature is 26°C (78°F), with maximums reaching up to 37°C (98°F) and minimums dropping as low as 13°C (55°F). This diverse range of temperatures makes it an ideal time for travelers to enjoy a variety of outdoor activities while also having the option to relax indoors during the cooler evenings.

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 26°C (78°F), with highs reaching up to 37°C (98°F) and lows dropping to around 13°C (55°F).
JanFebMarAprMayJunJulAugSepOctNovDec465059647480828278675451
Data source: Temperature data for Greenville generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Greenville

In Greenville in September, the precipitation amount is 80 mm (3.1 in) during a span of 7 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 (3.1 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec120196166157129125931138012985128
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Greenville

In Greenville in September, humidity is 73%. With an average temperature of 26°C (78°F), this humidity feels like a warm embrace, making traveling a bit sticky but also inviting, as the air wraps around you, intensifying the heat and creating a tropical atmosphere.

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 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%83%80%82%83%80%80%75%73%76%84%88%
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.
JanFebMarAprMayJunJulAugSepOctNovDec47810111211119764
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.
 TemperaturePrecipitationHumidityUV
January Weather8°C (46°F)120 mm (4.7 inches)84%moderate
February Weather10°C (50°F)196 mm (7.7 inches)83%high
March Weather15°C (59°F)166 mm (6.5 inches)80%very high
April Weather18°C (64°F)156 mm (6.2 inches)82%very high
May Weather23°C (74°F)129 mm (5.1 inches)83%extreme
June Weather26°C (80°F)125 mm (4.9 inches)80%extreme
July Weather28°C (83°F)93 mm (3.7 inches)80%extreme
August Weather28°C (82°F)113 mm (4.4 inches)75%extreme
September Weather26°C (78°F)80 mm (3.1 inches)73%very high
October Weather20°C (67°F)129 mm (5.1 inches)76%high
November Weather12°C (54°F)85 mm (3.4 inches)84%high
December Weather10°C (51°F)128 mm (5.0 inches)88%moderate

Compare Greenville's Climate with Cities Worldwide