If you planning to travel to St. Louis Mercantile Library, St Louis, Missouri, 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 1:15 PM. The temperature feels like 28.950000000000003 with a humidity level of 70 so dress accordingly. Cloud coverage is 18 percent with visibility at 12.7 percent. Today’s UV index is 2, don’t forget the sunscreen if you need it! Today’s winds are traveling east-southeast at a speed of 3 MPH. At the end of the day don’t miss the sunset at 10:45 PM.