If you planning to travel to Karuizawa Prince Hotel Ski Resort, 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 9:22 PM. The temperature feels like 42.55 with a humidity level of 84 so dress accordingly. Cloud coverage is 41 percent with visibility at 14.9 percent. Today’s UV index is 0, don’t forget the sunscreen if you need it! Today’s winds are traveling southeast at a speed of 4 MPH. At the end of the day don’t miss the sunset at 7:45 AM.