The normal body temperature for adults is between 97.6 and 99.6 degrees Fahrenheit, so anything below 97.6 degrees is considered low, according to WebMD. Since hormones play a significant role in body temperatures, what may be low for one individual may be normal for another.
Someone with an extreme low body temperature is considered to suffering from hypothermia, states MedicineNet. Hypothermia is when the body temperature is 95 degrees Fahrenheit or lower. This often occurs when the body is subjected to cold conditions, such as prolonged activities in winter weather or submersion into cold water, for an extended period of time.