May in Jirkov is the rainiest month of the year. In May, the weather in Jirkov is typically warm. Average daily high temperature in May is about 16 degrees above zero. On average, Jirkov has 16 rainy, 9 partly cloudy, 3 sunny, and 3 cloudy days in May. The rains are usually moderate. May as well as January, February, March, and April is considered the most uncomfortable time to visit Jirkov.