If you planning to travel to Mauna Kea Observatory, Hawaii, 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 4:02 PM. The temperature feels like 50.8 with a humidity level of 74 so dress accordingly. Cloud coverage is 8 percent with visibility at 13.7 percent. Today’s UV index is 11, don’t forget the sunscreen if you need it! Today’s winds are traveling southeast at a speed of 8 MPH. At the end of the day don’t miss the sunset at 4:38 AM.