May in Zheleznovodskiy is the rainiest month of the year. In May, the weather in Zheleznovodskiy is typically warm. Average daily high temperature in May is about 17 degrees above zero. On average, Zheleznovodskiy has 24 rainy and 7 sunny days in May. The rains are usually heavy. May as well as March and April is considered the most uncomfortable time to visit Zheleznovodskiy.