In May, the weather in Rybnitsa is typically cold. Average daily high temperature in May is about 8 degrees above zero. On average, Rybnitsa has 16 rainy, 9 cloudy, 4 sunny, and 2 partly cloudy days in May. The rains are usually moderate. May as well as January, February, April, and September is considered the most uncomfortable time to visit Rybnitsa.