May in Mirny is the rainiest month of the year. In May, the weather in Mirny is typically cold. Average daily high temperature in May is about 8 degrees above zero. On average, Mirny has 14 cloudy, 13 rainy, 3 sunny, and 1 snowy day in May. The rains are usually light. May as well as January, February, March, and September is considered the most uncomfortable time to visit Mirny.