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Body Temperature Basics
• Average body temperature falls within a range.
• Average body temperature varies from person to person
and can fluctuate throughout the day.
• Average body temperature also varies based on body
location. Therefore, measurements from different sites
should not be compared directly.
• To determine if an individual has an elevated body
temperature or fever, it is important to know their
average body temperature when they are well.
• Take multiple readings to obtain the average body
temperature range and note where the temperature was
measured on the body, for example, the forehead or ear
temperature.
Body Site Normal Temperature Range
Forehead 94.5°F- 99.1°F (34.7°C-37.3°C)
Ear 96.4°F-100.4°F (35.8°C-38.0°C)
Mouth 95.9°F- 99.5°F (35.5°C-37. 5°C)
Armpit 94.5°F- 99.1°F (34.7°C-37. 3°C)
Rectal 97.9°F-100.4°F (36.6°C-38.0°C)
The average body temperature range varies slightly with age
and biological sex. Newborns & children have higher body
temperatures than adults, and adults have higher body
temperatures than the elderly. Biological female body
temperatures are approximately 0.5°F (0.3°C) higher than
biological male body temperatures.
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