The average range of basal body temperatures is between 97.7-98.2 Fahrenheit, but normal temperatures may be different from one woman to another.

Q: What Is The Average BBT Basal Body Temperature?

A: Ideally, a woman’s temperature will not change more than 0.5 degrees in the follicular phase, it will go up at least 0.2 degrees at ovulation and it will stay above the coverline during the luteal phase. The thyroid is the gland most responsible for metabolic rate and, thus, basal temperature. Low basal temperatures, below 97.7° F, may reflect hypothyroidism; high basal temperatures, above 98.2° F, may be evidence of hyperthyroidism (or an infection).