In May, the weather in Klasterec nad Ohri is typically warm. Average daily high temperature in May is about 14 degrees above zero. On average, Klasterec nad Ohri has 17 rainy, 7 sunny, 4 partly cloudy, and 3 cloudy days in May. The rains are usually heavy. May as well as February, March, April, and October is considered the most uncomfortable time to visit Klasterec nad Ohri.