Oyasu Onsen Weather (Next 3 days): The snow forecast for Oyasu Onsen is: A heavy fall of snow, heaviest during Wed night. Freeze-thaw conditions (max 2°C on Wed afternoon, min -7°C on Wed night). Winds decreasing (strong winds from the WNW on Wed night, light winds from the W by Fri morning).
Oyasu Onsen Weather (Days 4-6): Drizzle at first, then turning colder with dusting of snow on Sun night. Freeze-thaw conditions (max 8°C on Sun morning, min 0°C on Mon morning). Winds increasing (light winds from the S on Sat night, fresh winds from the W by Mon afternoon).