January weather forecast in Karuizawa

January in Karuizawa is the coldest month of the year. In January, the weather in Karuizawa is typically cold. Average daily high temperature in January is about 1 degree above zero. On average, Karuizawa has 15 partly cloudy, 11 sunny, and 5 rainy days in January. The rains are usually moderate. January as well as February, March, June, and July is considered the most uncomfortable time to visit Karuizawa.