The weather in Sumter in August is hot. The average temperatures are between 22°C and 32°C.
You can expect rain for roughly half of the month of August in Sumter. 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 Sumter in August 2025.
If you’re planning to visit Sumter in the near future, we highly recommend that you review the 14 day weather forecast for Sumter before you arrive.
Temperatures
32° / 22°
Rainy Days
8
Snowy Days
0
Dry Days
23
Rainfall
168
mm
Sun Hours
7.4
Hrs
