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 15 cloudy, 8 rainy, 5 sunny, and 3 partly cloudy days in March. The rains are usually light. March as well as April, May, November, and December is considered the most uncomfortable time to visit Karlovy Vary.