December in Aomori is the windiest month of the year. In December, the weather in Aomori is typically cold. Average daily high temperature in December is about 1 degree above zero. On average, Aomori has 22 rainy, 8 snowy, and 1 sunny day in December. The rains are usually heavy. December as well as March and November is considered the most uncomfortable time to visit Aomori.