January in Kasansai is the windiest and the coldest month of the year. In January, the weather in Kasansai is typically cold. Average daily high temperature in January is about 3 degrees above zero. On average, Kasansai has 15 partly cloudy, 10 sunny, 4 rainy, and 2 cloudy days in January. The rains are usually light. January as well as February and December is considered the most uncomfortable time to visit Kasansai.