In January, the weather in Ust'-Yansk is typically freezing. Average daily high temperature in January is about 27 degrees below zero. On average, Ust'-Yansk has 13 partly cloudy, 9 sunny, 8 cloudy, and 1 snowy day in January. The snowfalls are usually light. January as well as February, March, April, and October is considered the most uncomfortable time to visit Ust'-Yansk.