In March, the weather in Karlovy Vary is typically cold. Average daily high temperature in March is about 5 degrees above zero. On average, Karlovy Vary has 12 cloudy, 7 rainy, 7 partly cloudy, 3 sunny, and 2 snowy days in March. The rains are usually moderate. March as well as January, February, April, and May is considered the most uncomfortable time to visit Karlovy Vary.