September in Punta del Este is 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 9 rainy, 9 sunny, 8 partly cloudy, and 4 cloudy days in September. The rains are usually heavy. September as well as May, June, July, and August is considered the most uncomfortable time to visit Punta del Este.