If you planning to travel to Security Building, 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 11:46 AM. The temperature feels like 63.65 with a humidity level of 76 so dress accordingly. Cloud coverage is 56 percent with visibility at 13 percent. Today’s UV index is 6, don’t forget the sunscreen if you need it! Today’s winds are traveling south-southwest at a speed of 15 MPH. At the end of the day don’t miss the sunset at 12:22 AM.