In April, the weather in Chmielnik is typically warm. Average daily high temperature in April is about 13 degrees above zero. On average, Chmielnik has 11 rainy, 8 sunny, 6 partly cloudy, and 5 cloudy days in April. The rains are usually moderate. April as well as February, March, May, and November is considered the most uncomfortable time to visit Chmielnik.