At what time of day is body temperature typically lowest?

The body temperature is typically lowest in the morning, which is a natural result of the body's circadian rhythm. During this time, the body's metabolic rate is at its lowest as it has been resting overnight, leading to a decrease in heat production. Additionally, the body has not yet started to engage in physical activities or respond to external factors such as feeding or exercise that would raise its temperature throughout the day.

In contrast, as the day progresses, temperatures tend to rise during midday and early afternoon when the body is more active, leading to increased metabolic processes. By late afternoon and evening, temperatures can still be higher than in the early morning, as the body continues to be active and processes like digestion also contribute to producing body heat. Therefore, recognizing the pattern of temperature fluctuations throughout the day is critical in understanding the normal physiological processes of the body.