September in Tyumen is the rainiest month of the year. In September, the weather in Tyumen is typically warm. Average daily high temperature in September is about 12 degrees above zero. On average, Tyumen has 16 rainy, 11 cloudy, and 3 sunny days in September. The rains are usually moderate. September as well as January, February, April, and October is considered the most uncomfortable time to visit Tyumen.