September in Kumasi is the rainiest month of the year. In September, the weather in Kumasi is typically hot. Average daily high temperature in September is about 29 degrees above zero. On average, Kumasi has 25 rainy, 3 cloudy, and 2 partly cloudy days in September. The rains are usually heavy. September as well as March, April, May, and June is considered the most uncomfortable time to visit Kumasi.