June in Kingston is the windiest and the cloudiest month of the year. In June, the weather in Kingston is typically hot. Average daily high temperature in June is about 29 degrees above zero. On average, Kingston has 18 rainy, 7 sunny, 4 partly cloudy, and 1 cloudy day in June. The rains are usually heavy. June as well as September and October is considered the most uncomfortable time to visit Kingston.