October in Hiroshima is the sunniest month of the year. In October, the weather in Hiroshima is typically warm. Average daily high temperature in October is about 19 degrees above zero. On average, Hiroshima has 12 partly cloudy, 11 sunny, 6 rainy, and 2 cloudy days in October. The rains are usually heavy. October as well as {{month_nom: February}}, and {{month_nom: February}} is considered the most comfortable time to visit Hiroshima.