January in Ust-Omchug is the most freezing month of the year. In January, the weather in Ust-Omchug is typically freezing. Average daily high temperature in January is about 28 degrees below zero. On average, Ust-Omchug has 15 cloudy, 9 partly cloudy, 6 sunny, and 1 snowy day in January. The snowfalls are usually light. January as well as February, March, November, and December is considered the most uncomfortable time to visit Ust-Omchug.