In June, the weather in Cesky Krumlov is typically warm. Average daily high temperature in June is about 18 degrees above zero. On average, Cesky Krumlov has 20 rainy, 7 sunny, 2 partly cloudy, and 1 cloudy day in June. The rains are usually heavy. June as well as February, March, April, and May is considered the most uncomfortable time to visit Cesky Krumlov.