September in Kingstown is the warmest month of the year. In September, the weather in Kingstown is typically hot. Average daily high temperature in September is about 28 degrees above zero. On average, Kingstown has 22 rainy, 5 sunny, 2 partly cloudy, and 1 cloudy day in September. The rains are usually heavy. September as well as June, July, August, and October is considered the most uncomfortable time to visit Kingstown.