May in Klyuchevskiy is the windiest and the cloudiest month of the year. In May, the weather in Klyuchevskiy is typically warm. Average daily high temperature in May is about 13 degrees above zero. On average, Klyuchevskiy has 13 rainy, 8 cloudy, 6 partly cloudy, and 4 sunny days in May. The rains are usually moderate. May as well as January, February, November, and December is considered the most uncomfortable time to visit Klyuchevskiy.