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 11:01 AM. The temperature feels like 40.45 with a humidity level of 82 so dress accordingly. Cloud coverage is 84 percent with visibility at 8.7 percent. Today’s UV index is 2, don’t forget the sunscreen if you need it! Today’s winds are traveling west-northwest at a speed of 10 MPH. At the end of the day don’t miss the sunset at 11:04 PM.