In March, the weather in Brno is typically cold. Average daily high temperature in March is about 7 degrees above zero. On average, Brno has 11 partly cloudy, 7 cloudy, 6 rainy, 6 sunny, and 1 snowy day in March. The rains are usually light. March as well as January, February, April, and October is considered the most uncomfortable time to visit Brno.