Message: #1  2026-01-14  

Normal human body temperature averages 98.6°F (37°C), though it
typically ranges from 97°F to 99°F (36.1°C to 37.2°C) depending on
factors like age, time of day, and measurement method.[1][2]

## Variations by Age
Adults often fall between 97°F and 99°F orally, while older adults
over 60 may trend slightly lower around 96.4°F to 98.5°F. Children
and infants have wider ranges, such as 95.9°F to 99.5°F orally or up
to 100.4°F rectally.[3][8]

## Measurement Methods
Oral readings span 96.4°F to 99.1°F, rectal 98.2°F to 100.8°F,
axillary 96.4°F to 97.3°F, and tympanic 97°F to 100.2°F.
Temperature fluctuates daily, lowest in early morning and highest in
late afternoon.[5][10]

## Influencing Factors
Activity, gender (females slightly higher due to hormones), and
circadian rhythms cause natural shifts up to 1°F. Fevers exceed
100.4°F (38°C), while below 95°F signals hypothermia.[2][7]

[1](https://medlineplus.gov/ency/article/001982.htm)
[2](https://en.wikipedia.org/wiki/Human_body_temperature)
[3](https://www.webmd.com/first-aid/normal-body-temperature)
[4](https://www.healthline.com/health/what-is-normal-body-temperature)
[5](https://www.ncbi.nlm.nih.gov/books/NBK593193/table/ch1survey.T.normal_temperature_ranges19/)
[6](https://www.sakraworldhospital.com/blogs/what-is-the-normal-body-temperature-range/495)
[7](https://www.parashospitals.com/blogs/normal-body-temperature-guide)
[8](https://health.clevelandclinic.org/body-temperature-what-is-and-isnt-normal)
[9](https://med.stanford.edu/news/all-news/2023/09/body-temperature.html)
[10](https://www.ncbi.nlm.nih.gov/books/NBK331/)