What is the normal adult rectal temperature range in Fahrenheit?

The normal adult rectal temperature range is generally considered to be between 98.6°F and 100.6°F. Rectal temperatures are typically higher than oral or axillary (underarm) temperatures, providing a more accurate reflection of the core body temperature.

This range accounts for normal physiological variations in body temperature, which can fluctuate due to factors such as time of day, activity level, and individual health. Knowing that the average normal body temperature is 98.6°F, the upper limit of 100.6°F still falls within the normal spectrum, allowing for minor fluctuations without indicating a fever. This makes the provided range appropriate for assessing body temperature in adults via the rectal method.