Like Charleston, Kiawah Island has a humid subtropical climate with mild winters, and fairly hot and humid summers. Average temperatures in December, January and February are in the 60s, while average temperatures from May through September stay in the upper 80s. August, on average, is the month with the most precipitation. Temperatures in October and November tend to drop to the low 70s and mid-60s. It can get fairly cool in this area during the winter months, so you will need to bring some sweaters and light jackets if you plan to be outside during the day.
Rates at the vacation rental companies, hotels and the resort will increase slightly over the Fall and holiday seasons, and you may need to plan your trip several months in advance to secure your ideal dates. Peak season is during the late spring and summer months when the weather is well-suited for golfing and other outdoor activities. If you’re traveling to the area during the peak summer months, it can be fairly hot and humid so pack light clothing. Hotel and vacation rental rates are typically at their lowest during the winter months, so this can be a great time to enjoy a budget-friendly vacation to Kiawah Island.