The Claim: Cold Temperatures Improve Sleep

The New York Times reports:

Avoiding caffeine, sticking to a schedule and drinking a glass of warm milk are the usual tips for a good night’s rest. But the right room temperature can also play a crucial role.

Studies have found that in general, the optimal temperature for sleep is quite cool, around 60 to 68 degrees Fahrenheit. For some, temperatures that fall too far below or above this range can lead to restlessness.

Temperatures in this range, it seems, help facilitate the decrease in core body temperature that in turn initiates sleepiness. A growing number of studies are finding that temperature regulation plays a role in many cases of chronic insomnia.

Cold is good.