Traveling to Jefferson County Fairgrounds, Mount Vernon, Illinois? Here is your 6-day weather forecast in the area. Whether it is a warm weather destinations or cold climate don’t forget to consider weather, while you pack your bags for this trip. Start your day when the sunrises at 12:35 PM and don’t miss the sunset at 10:43 PM. Today’s winds are traveling southeast at a speed of 11 MPH. The temperature feels like 46 with a humidity level of 91. Cloud coverage is 83 percent with 7.8 percent visibility. Today’s UV index is 0 make sure to prepare properly. Make sure to plan your travel itinerary to match your travel weather forecast to make the most of your vacation with Reservations.com.