August in Ust-Kamenogorsk is the sunniest month of the year. In August, the weather in Ust-Kamenogorsk is typically warm. Average daily high temperature in August is about 26 degrees above zero. On average, Ust-Kamenogorsk has 15 sunny, 8 partly cloudy, 7 rainy, and 1 cloudy day in August. The rains are usually moderate. August as well as September is considered the most comfortable time to visit Ust-Kamenogorsk.