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 1:16 PM. The temperature feels like 27.849999999999998 with a humidity level of 69 so dress accordingly. Cloud coverage is 7 percent with visibility at 13.4 percent. Today’s UV index is 0, don’t forget the sunscreen if you need it! Today’s winds are traveling south-southeast at a speed of 10 MPH. At the end of the day don’t miss the sunset at 10:46 PM.