If you planning to travel to Rio Grande Valley Premium Outlets, Mercedes, Texas, 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 12:57 PM. The temperature feels like 73.85 with a humidity level of 68 so dress accordingly. Cloud coverage is 5 percent with visibility at 13.5 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 14 MPH. At the end of the day don’t miss the sunset at 11:40 PM.