May in Ossora is the cloudiest month of the year. In May, the weather in Ossora is typically cold. Average daily high temperature in May is about 3 degrees above zero. On average, Ossora has 17 cloudy, 5 rainy, 5 partly cloudy, and 4 sunny days in May. The rains are usually light. May as well as January, February, September, and October is considered the most uncomfortable time to visit Ossora.