Oyasu Onsen Weather (Next 3 days): The snow forecast for Oyasu Onsen is: Mild with heavy rain (total 26.0mm), heaviest during Wed afternoon. Becoming colder with a moderate fall of snow heaviest on Wed night. Freeze-thaw conditions (max 11°C on Mon morning, min -6°C on Wed night). Winds increasing (light winds from the S on Tue morning, strong winds from the NW by Wed night).
Oyasu Onsen Weather (Days 4-6): A heavy fall of snow, heaviest during Thu night. Freeze-thaw conditions (max 2°C on Sat morning, min -5°C on Thu morning). Winds increasing (light winds from the SW on Thu night, fresh winds from the WNW by Fri night).