In May, the weather in Poronaysk is typically cold. Average daily high temperature in May is about 8 degrees above zero. On average, Poronaysk has 11 rainy, 8 partly cloudy, 7 sunny, and 5 cloudy days in May. The rains are usually moderate. May as well as January, February, April, and October is considered the most uncomfortable time to visit Poronaysk.