June in Santiago de Cuba is the cloudiest month of the year. In June, the weather in Santiago de Cuba is typically hot. Average daily high temperature in June is about 30 degrees above zero. On average, Santiago de Cuba has 18 rainy, 7 sunny, and 5 partly cloudy days in June. The rains are usually heavy. June as well as July, August, September, and October is considered the most uncomfortable time to visit Santiago de Cuba.