January in Zheleznogorsk-Ilimsky is the most freezing month of the year. In January, the weather in Zheleznogorsk-Ilimsky is typically freezing. Average daily high temperature in January is about 18 degrees below zero. On average, Zheleznogorsk-Ilimsky has 11 cloudy, 9 snowy, 6 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 Zheleznogorsk-Ilimsky.