January in Komatsu is the rainiest, the cloudiest, and the coldest month of the year. In January, the weather in Komatsu is typically cold. Average daily high temperature in January is about 5 degrees above zero. On average, Komatsu has 29 rainy and 2 sunny 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 Komatsu.