September in Vitim is the rainiest month of the year. In September, the weather in Vitim is typically cold. Average daily high temperature in September is about 8 degrees above zero. On average, Vitim has 22 rainy, 5 sunny, and 3 cloudy days in September. The rains are usually moderate. September as well as January, February, April, and May is considered the most uncomfortable time to visit Vitim.