September in Punta del Este is the rainiest and the windiest month of the year. In September, the weather in Punta del Este is typically warm. Average daily high temperature in September is about 16 degrees above zero. On average, Punta del Este has 11 partly cloudy, 10 sunny, 7 rainy, and 2 cloudy days in September. The rains are usually heavy. September as well as June and July is considered the most uncomfortable time to visit Punta del Este.