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 10 degrees above zero. On average, Hiroshima has 11 rainy, 8 sunny, 7 cloudy, and 5 partly cloudy days in March. The rains are usually heavy. March as well as January, February, July, and August is considered the most uncomfortable time to visit Hiroshima.