September in Jinan is the cloudiest month of the year. In September, the weather in Jinan is typically warm. Average daily high temperature in September is about 25 degrees above zero. On average, Jinan has 15 partly cloudy, 11 sunny, 2 rainy, and 2 cloudy days in September. The rains are usually light. September as well as April, May, and October is considered the most comfortable time to visit Jinan.