May in Ust-Muya is the rainiest, the windiest, and the cloudiest month of the year. In May, the weather in Ust-Muya is typically warm. Average daily high temperature in May is about 10 degrees above zero. On average, Ust-Muya has 14 partly cloudy, 9 sunny, 4 rainy, and 4 cloudy days in May. The rains are usually light.