Your body has a core temperature rhythm. To initiate deep sleep, your core temp needs to drop by about 1 degree Celsius. If your room is too warm, this physiological process is blocked, leading to fragmented sleep. Science suggests the optimal bedroom temperature is around 18°C (65°F). It might feel chilly at first, but it allows your body to thermoregulate efficiently. If you can’t control the AC, take a hot shower before bed—the rapid cooling effect after stepping out mimics this temperature drop and signals your brain that it’s time to sleep.
Bedroom Temperature: The Magic Number is 18°C (65°F)
