Charleston County (Charleston)
September
Weather in Charleston County for September 2025
Your guide to Charleston County weather in September - trends and predictions
In general, the average temperature in Charleston County at the beginning of September is 27 °F. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 29.6 °F by the end of September.
Charleston County in September brings notable rainfall, with an average of 16 rainy days and a total precipitation of 214.6 mm.
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Temperatures
Rain 🌧️
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14
Dry days
16
Rainy days
0
Snow days
28°/22°
Temperatures
21 km/h
Avg max wind
75 %
Avg humidity
Charleston County in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  31° | 2 31° | 3 26° | 4 27° | 5 27° | 6 25° | 7  22° |
| 8 21° | 9 24° | 10 27° | 11 27° | 12  28° | 13 30° | 14  28° |
| 15  29° | 16 27° | 17 29° | 18 29° | 19  31° | 20 29° | 21 28° |
| 22 28° | 23 28° | 24  32° | 25 32° | 26 29° | 27 28° | 28 28° |
| 29 29° | 30 29° |
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Temperatures trend during September in Charleston County
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September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 | Patchy rain possible | 31° /25° | 0.2 mm | 7 | |
| Sept. 2 | Patchy rain possible | 31° /25° | 1.3 mm | 7 | |
| Sept. 3 | Light rain shower | 26° /24° | 2 mm | 6 | |
| Sept. 4 | Light rain shower | 27° /21° | 2.5 mm | 6 | |
| Sept. 5 | Patchy rain possible | 27° /22° | 1.5 mm | 6 | |
| Sept. 6 | Light rain shower | 25° /22° | 13.6 mm | 6 | |
| Sept. 7 | Heavy rain | 22° /21° | 47.5 mm | 5 | |
| Sept. 8 | Light rain shower | 21° /20° | 23.3 mm | 5 | |
| Sept. 9 | Light rain shower | 24° /21° | 6.9 mm | 5 | |
| Sept. 10 | Patchy rain possible | 27° /20° | 0.2 mm | 6 | |
| Sept. 11 | Patchy rain possible | 27° /23° | 0.1 mm | 6 | |
| Sept. 12 | Mist | 28° /24° | 1 mm | 7 | |
| Sept. 13 | Mist | 30° /23° | 3.4 mm | 7 | |
| Sept. 14 | Overcast | 28° /21° | 1 mm | 6 | |
| Sept. 15 | Partly cloudy | 29° /22° | 0.7 mm | 7 | |
| Sept. 16 | Partly cloudy | 27° /20° | 0 mm | 7 | |
| Sept. 17 | Torrential rain shower | 29° /20° | 29.5 mm | 7 | |
| Sept. 18 | Overcast | 29° /21° | 0 mm | 6 | |
| Sept. 19 | Cloudy | 31° /21° | 5.3 mm | 7 | |
| Sept. 20 | Overcast | 29° /21° | 0 mm | 7 | |
| Sept. 21 | Light rain shower | 28° /22° | 0.9 mm | 6 | |
| Sept. 22 | Overcast | 28° /21° | 0 mm | 7 | |
| Sept. 23 | Overcast | 28° /19° | 0.5 mm | 7 | |
| Sept. 24 | Sunny | 32° /22° | 0 mm | 8 | |
| Sept. 25 | Sunny | 32° /23° | 0 mm | 7 | |
| Sept. 26 | Torrential rain shower | 29° /23° | 24.7 mm | 6 | |
| Sept. 27 | Patchy rain possible | 28° /23° | 44.7 mm | 7 | |
| Sept. 28 | Patchy rain possible | 28° /21° | 0 mm | 7 | |
| Sept. 29 | Overcast | 29° /21° | 3.5 mm | 7 | |
| Sept. 30 | Overcast | 29° /22° | 0 mm | 7 | |
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Important Notice
Our weather forecast for Charleston County in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Charleston County forecast closer to your planned date for the most up-to-date weather information.
Charleston County in September - FAQ
What are the expected maximum and minimum temperatures in Charleston County during September?
During September, expect a variety of temperatures with highs around 28° and lows near 22°, suitable for diverse activities and preferences.
How much rainfall should be expected in Charleston County during September?
Significant rainfall exceeding 214.6 mm is expected in Charleston County during September, occurring over more than 16 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Charleston County during September?
The average wind speed in Charleston County during September is 21 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Charleston County
Explore the daily rainfall trends and prepare for Charleston Countys September weather 💧
UV exposure in Charleston County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Charleston County?Get accurate weather forecasts for Charleston County, located at latitude 32.777 and longitude -79.931. Stay updated with localized weather information tailored for Charleston County.
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