August in Ust-Kalmanka is the sunniest month of the year. In August, the weather in Ust-Kalmanka is typically warm. Average daily high temperature in August is about 23 degrees above zero. On average, Ust-Kalmanka has 12 sunny, 12 partly cloudy, 6 rainy, and 1 cloudy day in August. The rains are usually moderate. August as well as June is considered the most comfortable time to visit Ust-Kalmanka.