The average which is of the normal body temperature is generally said to be accepted as 98.6°F that is 37°C. Some studies have shown that the "normal" body temperature can have a wide range which is from 97°F that is 36.1°C to 99°F that is 37.2°C. A temperature that is said to be over 100.4°F that is 38°C most often means you have a fever caused by an infection or we can say illness.