March in Sosnowiec is the rainiest month of the year. In March, the weather in Sosnowiec is typically cold. Average daily high temperature in March is about 7 degrees above zero. On average, Sosnowiec has 14 rainy, 7 sunny, 5 cloudy, and 5 partly cloudy days in March. The rains are usually light. March as well as January, February, April, and November is considered the most uncomfortable time to visit Sosnowiec.