May in Rumburk is the rainiest month of the year. In May, the weather in Rumburk is typically warm. Average daily high temperature in May is about 16 degrees above zero. On average, Rumburk has 18 rainy, 7 sunny, 4 partly cloudy, and 2 cloudy days in May. The rains are usually moderate. May as well as January, February, March, and November is considered the most uncomfortable time to visit Rumburk.