In April, the weather in Ust-Kut is typically cold. Average daily high temperature in April is about 2 degrees above zero. On average, Ust-Kut has 9 rainy, 9 snowy, 8 cloudy, 2 sunny, and 2 partly cloudy days in April. The rains are usually moderate. April as well as January, February, May, and September is considered the most uncomfortable time to visit Ust-Kut.