January weather forecast in Atami

January in Atami is the sunniest and the coldest month of the year. In January, the weather in Atami is typically cold. Average daily high temperature in January is about 7 degrees above zero. On average, Atami has 16 sunny, 8 rainy, and 7 partly cloudy days in January. The rains are usually heavy. January as well as February, March, April, and June is considered the most uncomfortable time to visit Atami.