July in Santiago de Cuba is the hottest month of the year. In July, the weather in Santiago de Cuba is typically hot. Average daily high temperature in July is about 30 degrees above zero. On average, Santiago de Cuba has 15 rainy, 13 sunny, and 3 partly cloudy days in July. The rains are usually moderate. July as well as June, August, September, and October is considered the most uncomfortable time to visit Santiago de Cuba.