May in Kuoloyarvi is the rainiest month of the year. In May, the weather in Kuoloyarvi is typically cold. Average daily high temperature in May is about 8 degrees above zero. On average, Kuoloyarvi has 25 rainy, 3 sunny, 2 cloudy, and 1 partly cloudy day in May. The rains are usually moderate. May as well as January, April, June, and July is considered the most uncomfortable time to visit Kuoloyarvi.