December in Kitakyushu is the windiest month of the year. In December, the weather in Kitakyushu is typically warm. Average daily high temperature in December is about 10 degrees above zero. On average, Kitakyushu has 18 rainy, 7 sunny, 4 partly cloudy, and 2 cloudy days in December. The rains are usually heavy. December as well as January, February, and July is considered the most uncomfortable time to visit Kitakyushu.