If you planning to travel to Hopkins Observatory, Williamstown, 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 12:18 PM. The temperature feels like -0.09999999999999964 with a humidity level of 60 so dress accordingly. Cloud coverage is 20 percent with visibility at 14.6 percent. Today’s UV index is 1, don’t forget the sunscreen if you need it! Today’s winds are traveling northwest at a speed of 6 MPH. At the end of the day don’t miss the sunset at 9:23 PM.