In September, the weather in Nizhnevartovsk is typically warm. Average daily high temperature in September is about 11 degrees above zero. On average, Nizhnevartovsk has 13 rainy, 9 cloudy, 5 partly cloudy, and 3 sunny days in September. The rains are usually moderate. September as well as January, February, October, and November is considered the most uncomfortable time to visit Nizhnevartovsk.