If you planning to travel to Three Cultures Square, Piedras Negras, Coahuila, Mexico, 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 1:10 PM. The temperature feels like 66 with a humidity level of 64 so dress accordingly. Cloud coverage is 5 percent with visibility at 14.4 percent. Today’s UV index is 5, don’t forget the sunscreen if you need it! Today’s winds are traveling southeast at a speed of 7 MPH. At the end of the day don’t miss the sunset at 11:45 PM.