September in Chilpancingo de los Bravo is the coldest month of the year. In September, the weather in Chilpancingo de los Bravo is typically warm. Average daily high temperature in September is about 22 degrees above zero. On average, Chilpancingo de los Bravo has 30 rainy days in September. The rains are usually heavy. September as well as June, July, August, and October is considered the most uncomfortable time to visit Chilpancingo de los Bravo.