If you planning to travel to Usui Pass, Karuizawa, 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 9:58 PM. The temperature feels like 20.5 with a humidity level of 66 so dress accordingly. Cloud coverage is 7 percent with visibility at 1.2 percent. Today’s UV index is 3, don’t forget the sunscreen if you need it! Today’s winds are traveling west-northwest at a speed of 9 MPH. At the end of the day don’t miss the sunset at 7:38 AM.