If you planning to travel to Kusatsu Onsen, Kusatsu, 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 9:17 PM. The temperature feels like 46.25 with a humidity level of 78 so dress accordingly. Cloud coverage is 64 percent with visibility at 9.5 percent. Today’s UV index is 2, don’t forget the sunscreen if you need it! Today’s winds are traveling west-southwest at a speed of 6 MPH. At the end of the day don’t miss the sunset at 7:49 AM.