Weather in Greenville County, South Carolina for September 2025
Until now, September 2025 in Greenville County has been nearly identical to the historical average, with a temperature of 27.4 °F (showing only a slight deviation of 0.5 °F).
The forecast for the coming days of September 2025 predicts a temperature of 30.6 °F , which is warmer than usual.
In general, the average temperature in Greenville County at the beginning of September is 27.6 °F. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 30.4 °F by the end of September.
The climate of Greenville County in September is notably wet, with an average of 13 rainy days, and a total of 327.9 mm of precipitation.
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Greenville County Weather September
Temperatures trend during September in Greenville County
September weather in Greenville County day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Patchy rain possible | 29° /18° | 1.3 mm | 7 | |
| Sept. 2 | Patchy rain possible | 28° /18° | 0.1 mm | 7 | |
| Sept. 3 |  Partly cloudy | 27° /17° | 0.4 mm | 7 | |
| Sept. 4 | Partly cloudy | 28° /17° | 0 mm | 7 | |
| Sept. 5 |  Overcast | 28° /19° | 0 mm | 7 | |
| Sept. 6 |  Patchy light rain | 26° /20° | 1.2 mm | 6 | |
| Sept. 7 | Patchy rain possible | 27° /18° | 0.4 mm | 7 | |
| Sept. 8 | Partly cloudy | 25° /16° | 0 mm | 6 | |
| Sept. 9 |  Sunny | 27° /14° | 0 mm | 7 | |
| Sept. 10 | Sunny | 27° /15° | 0 mm | 7 | |
| Sept. 11 | Overcast | 27° /15° | 0 mm | 7 | |
| Sept. 12 | Patchy light drizzle | 26° /16° | 1.8 mm | 6 | |
| Sept. 13 | Light rain shower | 25° /18° | 3 mm | 6 | |
| Sept. 14 | Light rain shower | 26° /17° | 5 mm | 7 | |
| Sept. 15 | Patchy rain possible | 26° /17° | 0.4 mm | 6 | |
| Sept. 16 | Partly cloudy | 30° /19° | 0 mm | 1.2 | |
| Sept. 17 | Sunny | 28° /17° | 0 mm | 1.4 | |
| Sept. 18 | Patchy rain possible | 28° /19° | 4.9 mm | 1.6 | |
| Sept. 19 | Patchy rain possible | 32° /18° | 0.4 mm | 1.5 | |
| Sept. 20 | Patchy rain possible | 30° /18° | 0.8 mm | 0 | |
| Sept. 21 | Patchy rain possible | 27° /17° | 0.6 mm | 5 | |
| Sept. 22 | Sunny | 28° /14° | 0 mm | 6 | |
| Sept. 23 | Sunny | 31° /16° | 0 mm | 6 | |
| Sept. 24 | Sunny | 34° /20° | 0 mm | 7 | |
| Sept. 25 | Patchy rain possible | 32° /22° | 0.7 mm | 6 | |
| Sept. 26 | Patchy rain possible | 32° /20° | 0.8 mm | 5 | |
| Sept. 27 | Sunny | 32° /19° | 0 mm | 6 | |
| Sept. 28 | Sunny | 34° /20° | 0 mm | 7 | |
| Sept. 29 |  Moderate rain at times | 23° /19° | 4.4 mm | 5 | |
| Sept. 30 |  Fog | 26° /18° | 9.1 mm | 6 | |
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Greenville County in September - FAQ
September rainfall patterns in Greenville County
UV exposure in Greenville County during September
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Where is Greenville County?Get accurate weather forecasts for Greenville County, located at latitude 34.853 and longitude -82.394. Stay updated with localized weather information tailored for Greenville County.