August in Ust'-Kuyga is the rainiest month of the year. In August, the weather in Ust'-Kuyga is typically warm. Average daily high temperature in August is about 13 degrees above zero. On average, Ust'-Kuyga has 11 partly cloudy, 7 rainy, 7 cloudy, and 6 sunny days in August. The rains are usually light.