December in Hachinohe is the rainiest and the windiest month of the year. In December, the weather in Hachinohe is typically cold. Average daily high temperature in December is about 4 degrees above zero. On average, Hachinohe has 19 rainy, 5 cloudy, 4 sunny, 2 partly cloudy, and 1 snowy day in December. The rains are usually moderate. December as well as January, February, and March is considered the most uncomfortable time to visit Hachinohe.