Chattanooga (TN)
September
Weather in Chattanooga, Tennessee for September 2026
Your guide to Chattanooga weather in September - trends and predictions
Until now, September 2026 in Chattanooga has been significantly warmer than historical averages.
The forecast for the next days in Chattanooga predicts temperatures to be around 29 °F, close to the historical average.
In general, the average temperature in Chattanooga at the beginning of September is 30.3 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 27.1 °F by the end of September.
The climate of Chattanooga in September is notably wet, with an average of 15 rainy days, and a total of 256.3 mm of precipitation.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
15
Dry days
15
Rainy days
0
Snow days
27°/18°
Temperatures
11 km/h
Avg max wind
69 %
Avg humidity
Chattanooga Weather September
Move between months or click on a day
Temperatures trend during September in Chattanooga
See the weather trend as well as the moving average line
September weather in Chattanooga day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Overcast | 29° /19° | 1.2 mm | 7 | |
| Sept. 2 | Overcast | 31° /20° | 0 mm | 7 | |
| Sept. 3 |  Sunny | 31° /19° | 5 mm | 7 | |
| Sept. 4 |  Partly cloudy | 32° /20° | 2.1 mm | 7 | |
| Sept. 5 | Overcast | 31° /21° | 1.3 mm | 8 | |
| Sept. 6 |  Mist | 30° /19° | 0.9 mm | 7 | |
| Sept. 7 |  Thundery outbreaks possible | 28° /18° | 0 mm | 5 | |
| Sept. 8 | Overcast | 28° /16° | 0 mm | 6 | |
| Sept. 9 | Thundery outbreaks possible | 28° /17° | 0.1 mm | 7 | |
| Sept. 10 | Partly cloudy | 30° /16° | 0.5 mm | 7 | |
| Sept. 11 | Fog | 30° /18° | 0.1 mm | 7 | |
| Sept. 12 |  Moderate rain at times | 27° /19° | 10.6 mm | 5 | |
| Sept. 13 | Sunny | 32° /20° | 32.7 mm | 8.2 | |
| Sept. 14 | Sunny | 33° /22° | 0 mm | 8.5 | |
| Sept. 15 | Sunny | 32° /22° | 0 mm | 8.3 | |
| Sept. 16 | Sunny | 33° /22° | 0.1 mm | 8 | |
| Sept. 17 | Sunny | 33° /22° | 4.7 mm | 8 | |
| Sept. 18 | Sunny | 32° /21° | 11.2 mm | 8 | |
| Sept. 19 | Overcast | 22° /17° | 1.3 mm | 5 | |
| Sept. 20 | Sunny | 24° /14° | 0 mm | 6 | |
| Sept. 21 | Overcast | 24° /14° | 0 mm | 6 | |
| Sept. 22 |  Cloudy | 25° /16° | 0 mm | 7 | |
| Sept. 23 | Cloudy | 26° /16° | 0 mm | 7 | |
| Sept. 24 | Partly cloudy | 27° /17° | 0 mm | 7 | |
| Sept. 25 | Overcast | 30° /17° | 0 mm | 7 | |
| Sept. 26 | Sunny | 32° /18° | 0 mm | 8 | |
| Sept. 27 |  Light rain shower | 23° /19° | 62.5 mm | 5 | |
| Sept. 28 | Sunny | 25° /18° | 6.1 mm | 6 | |
| Sept. 29 | Mist | 26° /18° | 0 mm | 6 | |
| Sept. 30 | Mist | 27° /18° | 0 mm | 6 | |
| Next | |||||
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 256.3 mm is expected in Chattanooga during September, occurring over more than 15 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 💧
Typically, Chattanooga has 15 rainy days in September with a total of 256.3 mm of rainfall.
UV exposure in Chattanooga during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Quick links
More Chattanooga weather pages
You are here
Where is Chattanooga?Get accurate weather forecasts for Chattanooga, located at latitude 35.046 and longitude -85.31. Stay updated with localized weather information tailored for Chattanooga.
Found a mistake?
We appreciate your attention to details. Tell us here.