If you planning to travel to Nantucket Atheneum, Nantucket, Massachusetts, 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 9:11 AM. The temperature feels like 70 with a humidity level of 76 so dress accordingly. Cloud coverage is 9 percent with visibility at 13.4 percent. Today’s UV index is 10, don’t forget the sunscreen if you need it! Today’s winds are traveling west-northwest at a speed of 7 MPH. At the end of the day don’t miss the sunset at 12:17 AM.