When is core body temperature typically lowest?

The core body temperature is typically lowest during the night due to the natural circadian rhythm that governs various physiological processes. This rhythm includes fluctuations in body temperature that are influenced by the sleep-wake cycle. During sleep, the body's metabolic rate decreases, leading to a drop in core body temperature, which allows for more efficient rest and recovery. This nocturnal cooling is a normal aspect of human physiology, helping to regulate sleep patterns and maintain overall health.

Other times of the day, such as the morning, afternoon, and midday, generally see higher core body temperatures due to increased activity, digestion, and metabolic processes that occur during waking hours. The body warms up in preparation for increased activity, peaking around midday before starting to taper down again as the day progresses.