In May, the weather in Zheleznogorsk is typically warm. Average daily high temperature in May is about 13 degrees above zero. On average, Zheleznogorsk has 15 rainy, 6 cloudy, 5 sunny, and 5 partly 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 Zheleznogorsk.