Hilton Head's climate is characterized by hot and humid summers, and mild winters. Summer weather starts in late March-early April, when temperatures begin consistently hitting the low 80s F/26 C. High temperatures May-August can reach 90 F/32 C, but the humidity often makes it feel hotter. Rainfall can be heavy during summer with brief afternoon showers. Those who are not used to high humidity may want to rest during the early afternoon.
Locals tend to enjoy the weather in early March and October. The mornings are typically mild and less humid, and temperatures hover in the mid-70s F/21-25 C during the afternoon. November is the driest month of the year, making it popular with golfers.
Winter months are mild with days in the 50s F/10 C, and some nights temperatures dip below freezing. Visitors should note that hurricane season is June-November and be aware of evacuation routes.