May in Murmansk is the rainiest month of the year. In May, the weather in Murmansk is typically cold. Average daily high temperature in May is about 7 degrees above zero. On average, Murmansk has 22 rainy, 7 cloudy, and 2 sunny days in May. The rains are usually light. May as well as January, April, June, and August is considered the most uncomfortable time to visit Murmansk.