April in Bol'shoy Uluy is the rainiest month of the year. In April, the weather in Bol'shoy Uluy is typically cold. Average daily high temperature in April is about 5 degrees above zero. On average, Bol'shoy Uluy has 22 rainy, 6 cloudy, and 2 sunny days in April. The rains are usually light. April as well as January, February, May, and October is considered the most uncomfortable time to visit Bol'shoy Uluy.