Click on a day for an hourly weather forecast
The weather in Chattanooga in August is hot. The average temperatures are between 19°C and 31°C. Usually the days in August are hot while the nights are a bit cooler.
You can expect rain for roughly half of the month of August in Chattanooga. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Chattanooga in August 2025.
If you’re planning to visit Chattanooga in the near future, we highly recommend that you review the 14 day weather forecast for Chattanooga before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 8° / 0° | 7 | 20 | 4 | 168 mm | Awful | Chattanooga in January |
| February | 11° / 2° | 9 | 15 | 4 | 180 mm | Awful | Chattanooga in February |
| March | 16° / 6° | 10 | 20 | 1 | 186 mm | Ok | Chattanooga in March |
| April | 21° / 9° | 8 | 22 | 0 | 185 mm | Ok | Chattanooga in April |
| May | 26° / 14° | 8 | 23 | 0 | 164 mm | Good | Chattanooga in May |
| June | 30° / 18° | 10 | 20 | 0 | 163 mm | Ok | Chattanooga in June |
| July | 32° / 19° | 10 | 21 | 0 | 208 mm | Ok | Chattanooga in July |
| August | 31° / 19° | 8 | 23 | 0 | 159 mm | Ok | Chattanooga in August |
| September | 28° / 16° | 5 | 25 | 0 | 160 mm | Perfect | Chattanooga in September |
| October | 22° / 10° | 5 | 26 | 0 | 140 mm | Good | Chattanooga in October |
| November | 15° / 5° | 6 | 24 | 1 | 137 mm | Good | Chattanooga in November |
| December | 11° / 3° | 8 | 21 | 2 | 187 mm | Awful | Chattanooga in December |