August in Ust'-Barguzin is the rainiest month of the year. In August, the weather in Ust'-Barguzin is typically warm. Average daily high temperature in August is about 18 degrees above zero. On average, Ust'-Barguzin has 11 partly cloudy, 10 sunny, 8 rainy, and 2 cloudy days in August. The rains are usually moderate.