What temperature is considered a fever in my baby?

100.5 F or 37.9 C: Measured rectally, which is the most correct way to take temperature under 2 months or so.

Over 100.4 rectal: Normal body temperature is a range-- it's not exactly 98.6. Over 100.4, measured rectally, is considered a fever.

100.4 or above: A rectal temperature is the most accurate way to measure your baby's temperature.

100.5 F or 38 C: There is no exact answer but in general a rectal temperature over 100.4 is considered a fever in infants.

Fever: 100.4 taken by rectal thermometer is considered a fever (or 38 celcius - also rectal temp).