September in San Pedro Sula is the cloudiest month of the year. In September, the weather in San Pedro Sula is typically hot. Average daily high temperature in September is about 30 degrees above zero. On average, San Pedro Sula has 29 rainy and 1 sunny day in September. The rains are usually heavy. September as well as May, June, July, and August is considered the most uncomfortable time to visit San Pedro Sula.