Hypothermia. Hypothermia is a condition in which core temperature drops below the required temperature for normal metabolism and body functions which is defined as 35.0 °C. Body temperature is usually maintained near a constant level of 36.5–37.5 °C through biologic homeostasis or thermoregulation.ypothermia. Hypothermia is a condition in which core temperature drops below the required temperature for normal metabolism and body functions which is defined as 35.0 °C. Body temperature is usually maintained near a constant level of 36.5–37.5 °C through biologic homeostasis or thermoregulation.