May in Nizhniy Unal is the rainiest month of the year. In May, the weather in Nizhniy Unal is typically cold. Average daily high temperature in May is about 9 degrees above zero. On average, Nizhniy Unal has 29 rainy and 2 sunny days in May. The rains are usually heavy. May as well as April, June, July, and September is considered the most uncomfortable time to visit Nizhniy Unal.