If you planning to travel to Grand Isle State Park, Grand Isle, Vermont, 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 11:27 AM. The temperature feels like 5.799999999999999 with a humidity level of 64 so dress accordingly. Cloud coverage is 35 percent with visibility at 13.7 percent. Today’s UV index is 4, don’t forget the sunscreen if you need it! Today’s winds are traveling south at a speed of 5 MPH. At the end of the day don’t miss the sunset at 10:46 PM.