If you planning to travel to Karuizawa Wild Bird Sanctuary, 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 9:26 PM. The temperature feels like 37.45 with a humidity level of 61 so dress accordingly. Cloud coverage is 20 percent with visibility at 7 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 6 MPH. At the end of the day don’t miss the sunset at 7:35 AM.