What is the normal body temperature range in Fahrenheit for a healthy adult?

• A. 98.6 to 100 F
• B. 96.0 to 98.6 F
• C. 100 to 102 F
• D. 97 to 99 F

Answer: (A)

Normal body temperature for a healthy adult centers on about 98.6°F, with a typical healthy range often taught as roughly 97.8–99.1°F. In practice, many references present a convenient range from about 98.6°F up to 100°F, acknowledging small daily fluctuations and differences in measurement method (oral vs. rectal vs. tympanic) and time of day. This range best aligns with what’s commonly taught as normal and avoids readings that would indicate hypothermia or fever. The other options include values that are clearly below normal, start at fever territory, or are narrower than what is usually considered a normal range.