The area receives roughly 55 inches of rainfall each year, mostly concentrated during the warm months.Get the monthly weather forecast for Saint Simons Island, GA, including daily high/low, historical averages, to help you plan ahead.Be prepared with the most accurate 10-day forecast for St. Temperatures range from an average high of 90☏ in the summer to an average low of 50☏ in the winter. Simons, GA enjoys a humid subtropical climate with mild winters and hot, humid summers. The area receives roughly 55 inches of rainfall each year, mostly concentrated during the warm months.Climate in St.
