normal body temperature range for adults
Fevers. When an adult's body temperature is above the normal range, he or she is considered to have a fever. Medically speaking, a fever is present with temperatures above 98.6Â°F with an oral thermometer or above 99.8Â°F with a rectal thermometer.n grown adults, a normal temperature can range from 97.8Â°F to 99Â°F, or between 36.5Â°C and 37.2Â°C.