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September Weather in Greenville, United States

Last updated: June 24, 2025

In September, the average temperature in Greenville, United States is a pleasant 16°C (62°F). However, temperatures can swing dramatically, ranging from a chilly -1°C (30°F) to a sweltering 35°C (96°F). Expect some moisture as well, with an average precipitation of 19 mm (0.7 in) spread over 3 days. The air is relatively comfortable, featuring an average humidity of 46%.

September Temperature in Greenville

In September in Greenville, the average temperature is 16°C (62°F). Maximum temperatures can reach 35°C (96°F), while minimums can drop as low as -1°C (30°F). Travelers should be prepared for a wide range of weather conditions during their visit.

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 16°C (62°F), with highs reaching up to 35°C (96°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec313235435363727061493930
Data source: Temperature data for Greenville generated using information from the Copernicus Climate Change Service.
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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 19 mm (0.7 in) over a period of 3 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 19 mm (0.7 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec16217614373581668194279131
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Greenville

In Greenville in September, humidity is 46%. With an average temperature of 16°C (62°F), this humidity feels like a mild and refreshing embrace, making it a comfortable time for traveling as you can explore the sights without feeling overly sticky or fatigued.

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 46%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%87%86%83%72%67%56%42%46%67%86%86%
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.
JanFebMarAprMayJunJulAugSepOctNovDec45810121211119753
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 Weather0°C (31°F)162 mm (6.4 inches)86%moderate
February Weather0°C (32°F)176 mm (6.9 inches)87%moderate
March Weather2°C (35°F)143 mm (5.6 inches)86%very high
April Weather6°C (43°F)73 mm (2.9 inches)83%very high
May Weather11°C (53°F)58 mm (2.3 inches)72%extreme
June Weather17°C (64°F)16 mm (0.6 inches)67%extreme
July Weather22°C (72°F)6 mm (0.2 inches)56%extreme
August Weather21°C (70°F)8 mm (0.3 inches)42%extreme
September Weather16°C (62°F)19 mm (0.7 inches)46%very high
October Weather9°C (49°F)42 mm (1.6 inches)67%high
November Weather4°C (39°F)79 mm (3.1 inches)86%moderate
December Weather-1°C (30°F)131 mm (5.2 inches)86%moderate

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