January in Ust-Ilga is the most freezing month of the year. In January, the weather in Ust-Ilga is typically freezing. Average daily high temperature in January is about 20 degrees below zero. On average, Ust-Ilga has 13 cloudy, 8 snowy, 5 sunny, and 5 partly cloudy days in January. The snowfalls are usually light. January as well as February, September, November, and December is considered the most uncomfortable time to visit Ust-Ilga.