August in Coral Gables is the hottest month of the year. In August, the weather in Coral Gables is typically hot. Average daily high temperature in August is about 30 degrees above zero. On average, Coral Gables has 20 rainy and 11 sunny days in August. The rains are usually heavy. August as well as June, July, September, and October is considered the most uncomfortable time to visit Coral Gables.