In September, the weather in Svetlogorsk is typically cold. Average daily high temperature in September is about 7 degrees above zero. On average, Svetlogorsk has 12 rainy, 7 cloudy, 7 partly cloudy, and 4 sunny days in September. The rains are usually heavy. September as well as January, February, March, and August is considered the most uncomfortable time to visit Svetlogorsk.