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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 delightful 24°C (75°F). However, be prepared for a range, as the minimum can drop to 10°C (50°F), while the maximum can soar to 36°C (97°F). Expect about 133 mm (5.2 in) of precipitation spread over 11 days, with an average humidity level of 80%—perfect for keeping the atmosphere comfortably refreshing!

September Temperature in Greenville

In September in Greenville, the average temperature is 24°C (75°F). The maximum can reach 36°C (97°F), while the minimum can be as low as 10°C (50°F). Whether you're looking to enjoy warm days or cool evenings, this climate provides a comfortable backdrop for exploring and enjoying all that Greenville has to offer.

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 (75°F), with highs reaching up to 36°C (97°F) and lows dropping to around 10°C (50°F).
JanFebMarAprMayJunJulAugSepOctNovDec455054637177807975665348
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 133 mm (5.2 in) spread over a period of 11 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 133 mm (5.2 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec868969991131331381611337396105
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 80%. With an average temperature of 24°C (75°F), this humidity feels like a warm, sticky blanket enveloping you, making travel slightly uncomfortable as sweat clings to your skin and the air feels thick, urging you to seek shade and hydration frequently.

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 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%81%80%80%81%82%83%83%80%80%83%84%
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.
JanFebMarAprMayJunJulAugSepOctNovDec46810111111109853
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 Weather7°C (45°F)86 mm (3.4 inches)84%moderate
February Weather10°C (50°F)89 mm (3.5 inches)81%high
March Weather12°C (54°F)69 mm (2.7 inches)80%very high
April Weather17°C (63°F)99 mm (3.9 inches)80%very high
May Weather21°C (71°F)113 mm (4.4 inches)81%extreme
June Weather25°C (77°F)133 mm (5.2 inches)82%extreme
July Weather27°C (80°F)138 mm (5.4 inches)83%extreme
August Weather26°C (79°F)161 mm (6.3 inches)82%very high
September Weather24°C (75°F)133 mm (5.2 inches)80%very high
October Weather19°C (67°F)72 mm (2.9 inches)79%very high
November Weather12°C (54°F)96 mm (3.8 inches)83%moderate
December Weather9°C (49°F)105 mm (4.1 inches)84%moderate

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