The average normal body temperature is generally accepted as 98.6°F (37°C) . Some studies have shown that the normal body temperature can have a wide range, from 97°F (36.1°C) to 99°F (37.2°C). A temperature over 100.4°F (38°C) most often means you have a fever caused by an infection or illness. Normal range of body temperature based on age. For a typical adult, body temperature can be anywhere from 97 F to 99 F . Adults over the age of 60 tend to have a lower body temperature, compared... Normal human body temperature (normothermia, euthermia) is the typical temperature range found in humans. The normal human body temperature range is typically stated as 36.5–37.5 °C (97.7–99.5 °F). [8][9] Human body temperature varies. A normal body temperature is key to staying healthy and preventing illnesses. Read here to learn about the tips for maintaining a healthy body temperature !