In September, the weather in Kostroma rural settlement is typically warm. Average daily high temperature in September is about 11 degrees above zero. On average, Kostroma rural settlement has 13 rainy, 7 sunny, 7 partly cloudy, and 3 cloudy days in September. The rains are usually moderate. September as well as January, February, May, and October is considered the most uncomfortable time to visit Kostroma rural settlement.