In February, the weather in Ust-Ilimsk is typically freezing. Average daily high temperature in February is about 13 degrees below zero. On average, Ust-Ilimsk has 11 cloudy, 8 snowy, 5 sunny, and 5 partly cloudy days in February. The snowfalls are usually light. February as well as January, November, and December is considered the most uncomfortable time to visit Ust-Ilimsk.