If you planning to travel to Heard Natural Science Museum and Wildlife Sanctuary, McKinney, 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 1:05 PM. The temperature feels like 67.1 with a humidity level of 74 so dress accordingly. Cloud coverage is 23 percent with visibility at 13.2 percent. Today’s UV index is 4, don’t forget the sunscreen if you need it! Today’s winds are traveling south at a speed of 16 MPH. At the end of the day don’t miss the sunset at 11:20 PM.