Cobb County (Marietta)
September
Weather in Cobb County, Georgia for September 2026
Your guide to Cobb County weather in September - trends and predictions
In general, the average temperature in Cobb County at the beginning of September is 28.7 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 27.6 °F by the end of September.
Cobb County experiences moderate rainfall in September, with an average of 7 rainy days and a total precipitation of 63.2 mm.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
23
Dry days
7
Rainy days
0
Snow days
29°/21°
Temperatures
12 km/h
Avg max wind
62 %
Avg humidity
Cobb County Weather September
Move between months or click on a day
Temperatures trend during September in Cobb County
See the weather trend as well as the moving average line
September weather in Cobb County day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Cloudy | 26° /19° | 0 mm | 8 | |
| Sept. 2 |  Partly cloudy | 27° /19° | 0 mm | 10 | |
| Sept. 3 |  Overcast | 27° /19° | 0 mm | 10 | |
| Sept. 4 |  Moderate rain at times | 31° /22° | 3.1 mm | 9 | |
| Sept. 5 | Cloudy | 32° /23° | 0 mm | 10 | |
| Sept. 6 |  Thundery outbreaks possible | 31° /24° | 0 mm | 5 | |
| Sept. 7 | Overcast | 27° /19° | 0 mm | 10 | |
| Sept. 8 | Overcast | 23° /19° | 0 mm | 2 | |
| Sept. 9 | Cloudy | 25° /19° | 0 mm | 5 | |
| Sept. 10 |  Sunny | 27° /18° | 0 mm | 9 | |
| Sept. 11 | Sunny | 30° /17° | 0 mm | 9 | |
| Sept. 12 | Partly cloudy | 28° /20° | 0 mm | 9 | |
| Sept. 13 | Overcast | 28° /22° | 0 mm | 7 | |
| Sept. 14 | Overcast | 31° /21° | 0 mm | 9 | |
| Sept. 15 | Overcast | 27° /22° | 0 mm | 5 | |
| Sept. 16 | Partly cloudy | 30° /21° | 0 mm | 8 | |
| Sept. 17 | Moderate rain at times | 30° /20° | 3.1 mm | 9 | |
| Sept. 18 | Partly cloudy | 30° /20° | 0 mm | 8 | |
| Sept. 19 | Thundery outbreaks possible | 30° /24° | 2.3 mm | 7 | |
| Sept. 20 | Thundery outbreaks possible | 29° /22° | 3.2 mm | 8 | |
| Sept. 21 | Overcast | 29° /22° | 0 mm | 8 | |
| Sept. 22 | Overcast | 32° /22° | 0 mm | 6 | |
| Sept. 23 | Partly cloudy | 31° /22° | 0 mm | 8 | |
| Sept. 24 | Cloudy | 30° /23° | 0 mm | 8 | |
| Sept. 25 |  Light rain shower | 27° /22° | 9.7 mm | 1 | |
| Sept. 26 | Moderate rain at times | 27° /21° | 4.6 mm | 2 | |
| Sept. 27 |  Fog | 26° /20° | 37.2 mm | 4 | |
| Sept. 28 | Mist | 29° /20° | 0 mm | 7 | |
| Sept. 29 | Partly cloudy | 29° /21° | 0 mm | 7 | |
| Sept. 30 | Overcast | 25° /20° | 0 mm | 6 | |
| Next | |||||
Important Notice
Our weather forecast for Cobb 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 Cobb County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Cobb County in September - FAQ
What are the expected maximum and minimum temperatures in Cobb County during September?
During September, expect a variety of temperatures with highs around 29° and lows near 21°, suitable for diverse activities and preferences.
How much rainfall should be expected in Cobb County during September?
Moderate rainfall is anticipated in Cobb County during September, with a total of 63.2 mm spread over approximately 7 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Cobb County during September?
The average wind speed in Cobb County during September is 12 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Cobb County
Explore the daily rainfall trends and prepare for Cobb Countys September weather 💧
Typically, Cobb County has 7 rainy days in September with a total of 63.2 mm of rainfall.
UV exposure in Cobb County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Top locations in Cobb County
Select a location for an accurate weather forecast
More Locations Quick links
More Cobb County weather pages
You are here
Where is Cobb County?Get accurate weather forecasts for Cobb County, located at latitude 33.953 and longitude -84.55. Stay updated with localized weather information tailored for Cobb County.
Found a mistake?
We appreciate your attention to details. Tell us here.