The weather in Hilton Head Island in September is very hot. The average temperatures are between 24°C and 29°C, drinking water regularly is advisable.
You can expect rain for roughly half of the month of September in Hilton Head Island. 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 Hilton Head Island in September 2025.
If you’re planning to visit Hilton Head Island in the near future, we highly recommend that you review the 14 day weather forecast for Hilton Head Island before you arrive.
Temperatures
29° / 24°
Rainy Days
8
Snowy Days
0
Dry Days
22
Rainfall
201
mm
Sun Hours
10.7
Hrs
