Taking into account the local weather in Poro-shosuke can help you maximize your time at the pool during your trip. The hottest months are usually August and July with an average temp of 64°F, while the coldest months are January and February with an average of 28°F. The snowiest months in Poro-shosuke are January, February, March, and December, with each month seeing an average of 30 inches of snowfall.