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.
Temperatures
31° / 19°
Rainy Days
8
Snowy Days
0
Dry Days
23
Rainfall
159
mm
Sun Hours
10.9
Hrs
