If you planning to travel to Washington County Fairgrounds, Marietta, Ohio, 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 10:42 AM. The temperature feels like 68.35 with a humidity level of 79 so dress accordingly. Cloud coverage is 49 percent with visibility at 13 percent. Today’s UV index is 3, don’t forget the sunscreen if you need it! Today’s winds are traveling north-northwest at a speed of 8 MPH. At the end of the day don’t miss the sunset at 12:15 AM.