A baby’s body temperature can fluctuate. While 96.7°F (35.9°C) is on the lower side of normal, it warrants attention to ensure the baby is comfortable and healthy. Understanding the normal temperature range for infants and knowing when to take action is important for parents.
Normal Temperature Range for Babies
A healthy temperature range for babies is 97.9°F to 100.2°F (36.6°C to 37.9°C) when measured rectally. This method is considered most accurate for infants, especially those under three months of age, as it reflects internal body temperature. Other methods, such as armpit (axillary) or forehead (temporal artery) temperatures, can be used, but they may yield different readings. For instance, an armpit temperature is usually at least one degree lower than a rectal temperature.
For example, a normal oral temperature might range from 95.9°F to 99.5°F (35.5°C to 37.5°C). Factors like a baby’s clothing, activity level, and the time of day can cause minor fluctuations within this range. For babies older than 6 months, ear (tympanic) thermometers can be accurate, but they require proper placement and may be affected by earwax.
Addressing Low Body Temperature in Infants
A temperature of 96.7°F (35.9°C) for an infant is low; a safe low temperature is above 97.7°F (36.5°C). This low temperature might occur due to cool air exposure, being underdressed, or a recent bath. Babies, especially newborns, have a limited ability to regulate their body temperature and can lose heat rapidly, nearly four times faster than adults.
If a baby’s temperature is low, actions can help them warm up. Parents can try skin-to-skin contact, which effectively transfers body heat. Adding an extra layer of clothing or swaddling the baby in a blanket can increase warmth. Ensuring the room is at a comfortable temperature, around 68-72°F (20-22°C), also supports temperature regulation. After these interventions, re-check the baby’s temperature to confirm it has risen.
When to Seek Medical Attention
While a low temperature can often be resolved with warming measures, certain temperature readings and accompanying symptoms indicate a need for medical consultation. If a baby’s temperature consistently remains below 97°F (36.1°C) or drops below 96.8°F (36.0°C), particularly in newborns, contact a healthcare provider. A rectal temperature below 95°F (35°C) is classified as hypothermia and requires immediate medical attention.
For high temperatures, if a newborn under two months old has a rectal temperature of 100.4°F (38°C) or higher, emergency medical attention is necessary. For infants between two and three months old, a temperature of 100.4°F (38°C) or higher, regardless of how it was taken, should prompt a call to the pediatrician. Beyond specific temperature thresholds, other concerning symptoms like lethargy, difficulty breathing, a rash that doesn’t fade, inconsolable crying, or signs of dehydration should lead to immediate medical evaluation.