when checking your temperature under the arm what is normal
Temperature / Fever. Normal axillary (under the arm) temperature ranges from 97.5 to 99.3 degrees Fahrenheit (36.5 to 37.4 degrees Celsius)*. Taking a rectal temperature. Normal rectal temperature is 100.2 degrees Fahrenheit or less (37.9 degrees Celsius or less)*. Before taking your baby's axillary temperature, make sure the area under the arm is dry. 2  Insert the end of the thermometer under your baby's arm and hold his/her arm snugly against his/her body. 3  Wait five minutes or until the electronic thermometer beeps before removing. 4  Use only a blunt tipped rectal thermometer.