September in Ixtepec is the cloudiest month of the year. In September, the weather in Ixtepec is typically hot. Average daily high temperature in September is about 29 degrees above zero. On average, Ixtepec has 23 rainy, 3 sunny, 3 cloudy, and 1 partly cloudy day in September. The rains are usually heavy. September as well as June, July, and August is considered the most uncomfortable time to visit Ixtepec.