September in Cumana is the warmest month of the year. In September, the weather in Cumana is typically hot. Average daily high temperature in September is about 28 degrees above zero. On average, Cumana has 20 rainy, 4 sunny, 4 partly cloudy, and 2 cloudy days in September. The rains are usually moderate. September as well as July, August, and October is considered the most uncomfortable time to visit Cumana.