Oyasu Onsen Weather (Next 3 days): The snow forecast for Oyasu Onsen is: Moderate rain (total 11.0mm), heaviest on Fri morning. Mild temperatures (max 9°C on Sun night, min 1°C on Fri night). Winds decreasing (strong winds from the WNW on Fri afternoon, calm by Sat afternoon).
Oyasu Onsen Weather (Days 4-6): Heavy rain (total 20.0mm) on Tue afternoon. Becoming colder with heavy fall of snow, heaviest during Wed night. Freeze-thaw conditions (max 11°C on Mon morning, min -5°C on Wed night). Winds increasing (light winds from the W on Mon night, fresh winds from the WSW by Tue night).