The Best Temperature for a Good Night’s Sleep

The Best Temperature for a Good Night’s Sleep, by Sumathi Reddy. Light and time aren’t as important as temperature, new research shows.

The role of temperature has gotten increased attention after a study published last year found sleep may be more tightly regulated by temperature than by light. What’s more, core body temperature, which tends to fluctuate by a few degrees over the course of the day, needs to drop to help initiate sleep. …

Setting the thermostat to around 65 degrees Fahrenheit [18.3 ºC] is good for sleep, studies have found. Research has also found that room temperatures as low as 60.8 [16 ºC] degrees are best when people pile on the blankets. …

The body’s core temperature needs to drop by about 2 to 3 degrees Fahrenheit [1.1 to 1.7 ºC] to initiate sleep, Dr. Walker says. “If our core temperature is too high the brain cannot easily make the switch from being awake to being asleep, or create the best quality sleep.”