In May, the weather in Bol'shoy Uluy is typically warm. Average daily high temperature in May is about 12 degrees above zero. On average, Bol'shoy Uluy has 15 rainy, 10 cloudy, 4 sunny, and 2 partly cloudy days in May. The rains are usually moderate. May as well as January, February, April, and October is considered the most uncomfortable time to visit Bol'shoy Uluy.