January in Niigata is the rainiest, the cloudiest, and the coldest month of the year. In January, the weather in Niigata is typically cold. Average daily high temperature in January is about 4 degrees above zero. On average, Niigata has 31 rainy days in January. The rains are usually heavy. January as well as February, March, November, and December is considered the most uncomfortable time to visit Niigata.