Which temperature method yields a normal reading of 98.6 - 100.6 °F?

The normal temperature range for the rectal method is indeed 98.6 to 100.6 °F. This method is often considered one of the most accurate ways to measure core body temperature because it reflects the body’s internal temperature closely. Rectal temperatures typically run slightly higher than oral temperatures due to the location of the measurement, providing a precise indication of the body's thermal state.

In contrast, the oral method usually yields a normal range of about 97.6 to 99.6 °F, axillary (taken in the armpit) temperatures tend to be lower, and tympanic (ear) temperatures can also vary slightly but generally fall within a similar range to oral measurements. Understanding these variances is essential for accurate temperature assessment in clinical settings.