September in Kingstown is the hottest month of the year. In September, the weather in Kingstown is typically hot. Average daily high temperature in September is about 29 degrees above zero. On average, Kingstown has 15 rainy, 13 sunny, and 2 partly cloudy days in September. The rains are usually moderate. September as well as June, July, August, and October is considered the most uncomfortable time to visit Kingstown.