March in Hiroshima is the windiest month of the year. In March, the weather in Hiroshima is typically warm. Average daily high temperature in March is about 12 degrees above zero. On average, Hiroshima has 13 rainy, 8 sunny, 7 partly cloudy, and 3 cloudy days in March. The rains are usually heavy. March as well as January, February, June, and July is considered the most uncomfortable time to visit Hiroshima.