August in Ponce is the cloudiest month of the year. In August, the weather in Ponce is typically hot. Average daily high temperature in August is about 30 degrees above zero. On average, Ponce has 23 rainy, 5 partly cloudy, and 3 sunny days in August. The rains are usually heavy. August as well as April, May, June, and July is considered the most uncomfortable time to visit Ponce.