September in Bor is the cloudiest month of the year. In September, the weather in Bor is typically warm. Average daily high temperature in September is about 10 degrees above zero. On average, Bor has 14 rainy, 8 cloudy, 7 partly cloudy, and 1 sunny day in September. The rains are usually heavy. September as well as January, February, November, and December is considered the most uncomfortable time to visit Bor.