If you planning to travel to Omachi Dam, Omachi, 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 17 with a humidity level of 85 so dress accordingly. Cloud coverage is 80 percent with visibility at 1.4 percent. Today’s UV index is 0, don’t forget the sunscreen if you need it! Today’s winds are traveling west-northwest at a speed of 4 MPH. At the end of the day don’t miss the sunset at 7:38 AM.