Taking into account the local weather in Rishifuji is an important factor for planning your visit, especially if you plan to spend your trip poolside. The hottest months are usually August and September with an average temp of 63°F, while the coldest months are January and February with an average of 29°F. The snowiest months in Rishifuji are January, February, March, and December, with each month seeing an average of 30 inches of snowfall.