If you planning to travel to Mashu Onsen, Japan, here is your 6-day travel weather forecast to make sure you have all the essentials needed during your stay. Start your day when the sunrises at 9:24 PM. The temperature feels like 15.55 with a humidity level of 70 so dress accordingly. Cloud coverage is 28 percent with visibility at 9.8 percent. Today’s UV index is 2, don’t forget the sunscreen if you need it! Today’s winds are traveling northwest at a speed of 17 MPH. At the end of the day don’t miss the sunset at 6:48 AM.