If you planning to travel to Karuizawa Prince Shopping Plaza, 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 10:00 PM. The temperature feels like 23 with a humidity level of 65 so dress accordingly. Cloud coverage is 17 percent with visibility at 8 percent. Today’s UV index is 2, don’t forget the sunscreen if you need it! Today’s winds are traveling west at a speed of 7 MPH. At the end of the day don’t miss the sunset at 7:43 AM.