What Is the Average Human Body Temperature?
The widely cited average human body temperature is 98.6°F (37.0°C), but modern studies show normal body temperature varies among individuals and across the day.
Normal Temperature Ranges and Measurement
For adults, a normal oral temperature typically ranges from about 97°F to 99°F (36.1°C to 37.2°C). Rectal and ear readings are usually slightly higher, while armpit readings are slightly lower. Learn more about temperature ranges from the Mayo Clinic.
Factors That Affect Body Temperature
Body temperature can change with age, activity level, time of day, hormones, and metabolism. Older adults often have a lower average temperature, while infants and children may run slightly higher. Fever is generally defined as a temperature above 100.4°F (38.0°C).
