September in Guayaquil is the windiest month of the year. In September, the weather in Guayaquil is typically hot. Average daily high temperature in September is about 28 degrees above zero. On average, Guayaquil has 18 rainy, 6 cloudy, 5 partly cloudy, and 1 sunny day in September. The rains are usually heavy. September as well as January, February, March, and April is considered the most uncomfortable time to visit Guayaquil.