January in Ust-Muya is the sunniest and the most freezing month of the year. In January, the weather in Ust-Muya is typically freezing. Average daily high temperature in January is about 19 degrees below zero. On average, Ust-Muya has 24 sunny and 7 partly cloudy days in January. January as well as February, November, and December is considered the most uncomfortable time to visit Ust-Muya.