What is a normal rectal temperature for a 3 month old baby?

A normal rectal temperature for a 3-month-old baby typically ranges from 97.9°F (36.6°C) to 100.4°F (38°C). It's important to use a digital thermometer for accuracy, as rectal temperatures are generally considered the most reliable for infants. If the temperature exceeds 100.4°F, it may indicate a fever, and you should consult a pediatrician. Always monitor for other symptoms that might suggest illness.