Marietta Weather in August

The climate in Marietta during August can be summarized as hot, humid and a little damp.

August is in the summer in Marietta and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around a steamy 31°C (87°F), whilst at night 20°C (67°F) is normal.

On average August is the 2nd driest month of the year in Marietta with around 84mm 3.3 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.

On the flip side this corresponds to an average of 8.9 hours of sunshine per day.

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Marietta in August 2025.