April in Fukushima is the sunniest month of the year. In April, the weather in Fukushima is typically warm. Average daily high temperature in April is about 13 degrees above zero. On average, Fukushima has 13 rainy, 8 partly cloudy, 6 sunny, and 3 cloudy days in April. The rains are usually heavy. April as well as January, February, March, and July is considered the most uncomfortable time to visit Fukushima.