January in Kagoshima is the coldest month of the year. In January, the weather in Kagoshima is typically warm. Average daily high temperature in January is about 10 degrees above zero. On average, Kagoshima has 11 sunny, 10 rainy, 9 partly cloudy, and 1 cloudy day in January. The rains are usually heavy. January as well as June, July, August, and September is considered the most uncomfortable time to visit Kagoshima.