May in Ust-Kamenogorsk is the windiest month of the year. In May, the weather in Ust-Kamenogorsk is typically warm. Average daily high temperature in May is about 20 degrees above zero. On average, Ust-Kamenogorsk has 11 sunny, 9 rainy, 9 partly cloudy, and 2 cloudy days in May. The rains are usually moderate.