If you’ve ever woken up in the middle of the night with your sheets and jammies sweat-soaked or your hair matted to your face, you’ve probably figured it out already: Being too hot can interfere with your sleep.The temperature of the environment we sleep in matters a lot,” explains Chris Winter MD, medical director of the Sleep Medicine Center at Martha Jefferson Hospital in Virginia and author of The Sleep Solution: Why Your Sleep is Broken and How to Fix It. “There’s been a lot of research that shows that 62 to 67 degrees is the ideal for best, most efficient sleep quality,” he says.