In May, the weather in Sinegorsk is typically warm. Average daily high temperature in May is about 10 degrees above zero. On average, Sinegorsk has 13 rainy, 8 cloudy, 6 sunny, and 4 partly cloudy days in May. The rains are usually heavy. May as well as January, February, April, and August is considered the most uncomfortable time to visit Sinegorsk.