Child Fever Chart. In one case series, 40 percent of children younger than 36 months who presented to an emergency department with fever during times of generalized influenza epidemics (100 cases per 100,000 persons. Remember, a child has a fever when his or her temperature is 100.4°f (38°c) or higher, measured rectally.
Get medical care right away. A temperature chart for babies, children and bigger kids with a fever. A fever lower than 101ºf (38ºc) does not require treatment unless the toddler is uncomfortable.