April in Ust'-Kulom is the rainiest month of the year. In April, the weather in Ust'-Kulom is typically cold. Average daily high temperature in April is about 3 degrees above zero. On average, Ust'-Kulom has 19 rainy, 6 cloudy, and 5 snowy days in April. The rains are usually moderate. April as well as January, February, September, and October is considered the most uncomfortable time to visit Ust'-Kulom.