The weather in Charleston in May is hot. The average temperatures are between 20°C and 26°C.
You can expect rain for roughly half of the month of May in Charleston. 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 Charleston in May 2025.
If you’re planning to visit Charleston in the near future, we highly recommend that you review the 14 day weather forecast for Charleston before you arrive.
Temperatures
26° / 20°
Rainy Days
8
Snowy Days
0
Dry Days
23
Rainfall
165
mm
Sun Hours
11.1
Hrs
