Chattanooga (TN)
September
Weather in Chattanooga, Tennessee for September 2025
Your guide to Chattanooga weather in September - trends and predictions
Until now, September 2025 in Chattanooga is slightly cooler than the historical average by -1.9 °F.
The forecast for the upcoming days in Chattanooga predicts a temperature of 30.9 °F, which is slightly above the historical average.
In general, the average temperature in Chattanooga at the beginning of September is 27.7 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 28.4 °F by the end of September.
Chattanooga experiences moderate rainfall in September, with an average of 10 rainy days and a total precipitation of 251 mm.
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Temperatures
Rain 🌧️
More
20
Dry days
10
Rainy days
0
Snow days
27°/18°
Temperatures
11 km/h
Avg max wind
68 %
Avg humidity
Chattanooga Weather September
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Temperatures trend during September in Chattanooga
See the weather trend as well as the moving average line
September weather in Chattanooga day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Overcast | 26° /19° | 1.6 mm | 6 | |
| Sept. 2 | Overcast | 28° /20° | 0 mm | 6 | |
| Sept. 3 |  Sunny | 28° /18° | 6.7 mm | 7 | |
| Sept. 4 |  Partly cloudy | 30° /19° | 2.8 mm | 7 | |
| Sept. 5 | Overcast | 29° /20° | 1.7 mm | 7 | |
| Sept. 6 |  Mist | 27° /18° | 1.1 mm | 6 | |
| Sept. 7 |  Thundery outbreaks possible | 26° /17° | 0 mm | 6 | |
| Sept. 8 | Overcast | 25° /15° | 0 mm | 5 | |
| Sept. 9 | Thundery outbreaks possible | 27° /17° | 0.1 mm | 6 | |
| Sept. 10 | Mist | 28° /16° | 0.7 mm | 7 | |
| Sept. 11 | Fog | 29° /17° | 0 mm | 6 | |
| Sept. 12 |  Moderate rain at times | 26° /18° | 6.9 mm | 6 | |
| Sept. 13 | Overcast | 27° /18° | 5.6 mm | 6 | |
| Sept. 14 | Sunny | 32° /20° | 0 mm | 1.6 | |
| Sept. 15 | Sunny | 32° /17° | 0 mm | 1.5 | |
| Sept. 16 |  Patchy rain possible | 29° /18° | 3.9 mm | 1.6 | |
| Sept. 17 | Partly cloudy | 31° /17° | 0 mm | 1.7 | |
| Sept. 18 | Sunny | 32° /17° | 0 mm | 0 | |
| Sept. 19 | Sunny | 33° /17° | 0 mm | 6 | |
| Sept. 20 | Patchy rain possible | 31° /17° | 1.9 mm | 5 | |
| Sept. 21 | Patchy rain possible | 29° /15° | 0.4 mm | 5 | |
| Sept. 22 | Partly cloudy | 29° /15° | 0 mm | 6 | |
| Sept. 23 | Sunny | 31° /17° | 0 mm | 6 | |
| Sept. 24 | Partly cloudy | 32° /18° | 0 mm | 6 | |
| Sept. 25 | Patchy rain possible | 31° /20° | 0.2 mm | 5 | |
| Sept. 26 | Patchy rain possible | 29° /18° | 2.2 mm | 5 | |
| Sept. 27 | Sunny | 31° /19° | 0 mm | 6 | |
| Sept. 28 | Sunny | 24° /17° | 9.2 mm | 6 | |
| Sept. 29 | Mist | 25° /17° | 0 mm | 6 | |
| Sept. 30 | Mist | 27° /17° | 0 mm | 6 | |
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Important Notice
Our weather forecast for Chattanooga 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 Chattanooga forecast closer to your planned date for the most up-to-date weather information.
Change Month
Chattanooga in September - FAQ
What are the expected maximum and minimum temperatures in Chattanooga during September?
During September, expect a variety of temperatures with highs around 27° and lows near 18°, suitable for diverse activities and preferences.
How much rainfall should be expected in Chattanooga during September?
Significant rainfall exceeding 251 mm is expected in Chattanooga during September, occurring over more than 10 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Chattanooga during September?
The average wind speed in Chattanooga during September is 11 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Chattanooga
Explore the daily rainfall trends and prepare for Chattanoogas September weather 💧
UV exposure in Chattanooga during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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