In May, the weather in Ugno-Kurilsk is typically cold. Average daily high temperature in May is about 8 degrees above zero. On average, Ugno-Kurilsk has 11 cloudy, 10 rainy, 5 sunny, and 5 partly cloudy days in May. The rains are usually heavy. May as well as April, November, and December is considered the most uncomfortable time to visit Ugno-Kurilsk.