If you planning to travel to Washington County Courthouse, Nashville, Illinois, 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 11:56 AM. The temperature feels like 67.15 with a humidity level of 77 so dress accordingly. Cloud coverage is 4 percent with visibility at 12.5 percent. Today’s UV index is 6, don’t forget the sunscreen if you need it! Today’s winds are traveling southeast at a speed of 3 MPH. At the end of the day don’t miss the sunset at 11:34 PM.