What is the typical normal range for axillary temperature readings?

• A. 97.0 to 99.0 Fahrenheit
• B. 96.6 to 98.6 Fahrenheit
• C. 95.0 to 97.0 Fahrenheit
• D. 98.6 to 100.4 Fahrenheit

Answer: (B)

Axillary readings reflect skin temperature under the arm, which is influenced by ambient air and often runs cooler than core or oral temperatures. The typical normal range for this site is 96.6 to 98.6 degrees Fahrenheit, accounting for the usual 0.5–1 degree Fahrenheit difference below oral readings. To obtain an accurate axillary measurement, keep the arm snug against the body and ensure the skin is dry so air currents don’t affect the result.

Other ranges would not fit the site’s known pattern: ranges closer to oral normals (around 97.0–99.0°F) are too high for axillary readings, while very low ranges (like 95.0–97.0°F) would suggest hypothermia. Higher ranges like 98.6–100.4°F align more with oral or rectal sites, not typical axillary values.