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 19 degrees below zero. On average, Zheleznogorsk-Ilimsky has 24 cloudy, 4 snowy, 2 sunny, and 1 partly cloudy day in January. The snowfalls are usually light. January as well as February, April, May, and September is considered the most uncomfortable time to visit Zheleznogorsk-Ilimsky.