In August, the weather in Ust-Dunguy is typically warm. Average daily high temperature in August is about 20 degrees above zero. On average, Ust-Dunguy has 12 sunny, 11 partly cloudy, 7 rainy, and 1 cloudy day in August. The rains are usually heavy. August as well as March, June, and July is considered the most comfortable time to visit Ust-Dunguy.