July in Ust-Muya is the rainiest, the cloudiest, and the warmest month of the year. In July, the weather in Ust-Muya is typically warm. Average daily high temperature in July is about 24 degrees above zero. On average, Ust-Muya has 14 rainy, 6 sunny, 6 cloudy, and 5 partly cloudy days in July. The rains are usually heavy.