What is a normal temp for a baby under their arm?

A normal temperature for a baby taken under the arm (axillary) generally ranges from about 97.6°F to 98.6°F (36.4°C to 37°C). It's important to note that axillary temperatures are usually slightly lower than those taken rectally. If a baby's temperature exceeds 100.4°F (38°C), it may indicate a fever, and it's advisable to consult a healthcare professional. Always consider the method of measurement and the specific guidelines for infants.