If you planning to travel to Charles Mears State Park, Pentwater, Michigan, 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 11:42 AM. The temperature feels like 64.6 with a humidity level of 84 so dress accordingly. Cloud coverage is 6 percent with visibility at 9.7 percent. Today’s UV index is 3, don’t forget the sunscreen if you need it! Today’s winds are traveling south-southeast at a speed of 4 MPH. At the end of the day don’t miss the sunset at 11:26 PM.