A baby’s temperature naturally goes up throughout the day or when wrapped in a warm blanket. Likewise, their temperature may go down on colder days or after spending time in the bath.
But sometimes, you might notice that your baby is feeling a bit warmer to the touch than usual. Or perhaps they’re showing signs of illness, such as extra fussiness, not feeding as well or sleeping more than usual. When you see these signs, it’s possible they have a fever.
Baby temperature chart: Normal to high fever ranges
Generally, a normal temperature for a baby is between 97°-100.3°F.
But if your baby is having trouble regulating their own temperature, you’ll typically see bigger spikes or drops in temperature that don’t go away on their own. Your baby will also start to show other symptoms.
This baby temperature chart shows low, normal and elevated temperatures.
| Baby’s temperature | What does it mean? |
|---|---|
| Lower than 95°F | Your baby’s temperature is too low |
| 97° – 100°F | Your baby’s temperature is within normal range |
| 100.4° – 103.9°F | Your baby has a fever |
| Greater than 104°F | Your baby has a high fever |
What is considered a low-grade fever for a baby?
Most doctors consider a mild or low-grade fever to be between 100°-102°F in babies. However, treatment may not be necessary for a baby with a low-grade fever unless your baby’s behavior has changed, your baby is less than 3 months old or there are other concerning symptoms. If any of these apply, it’s best to call your doctor or make an appointment.
Watch for low body temperature in infants
What should you do if your baby’s temperature is low? If your baby is cold, warm them up! Cuddling under a warm blanket or an extra layer of clothing are good choices to warm up your baby. But you should call your doctor if their temperature drops below 97°F.
Small babies are less able to regulate their body temperature. In other words, sometimes when babies get cold, they stay cold or get even colder.
If a baby’s temp stays low for a long period of time, it can affect their metabolism and breathing, as well as increase their overall risk of serious complications. So if your baby is cold to the touch or has blue lips or fingers, take their temperature. If it’s low, call your baby’s doctor.
Common fever signs and symptoms in babies
So what are signs that your baby may have a fever? Some of the first cues are when your baby:
- Feels warm when you use the back of your hand to touch their forehead or neck (their body temperature should be about the same as yours).
- If your child is acting normally, but their temperature is elevated, don’t worry just yet. Sometimes little ones can run quick fevers but not be sick, so monitor them for any symptoms listed below.
- Is shivering, sweating or has flushed red cheeks.
- Is acting differently. For example, they may:
- Seem weaker or sleepier than usual
- Be extra fussy
- Have a decreased appetite or poor eating
- Show no interest in playing
- Have trouble sleeping
- Isn’t peeing like normal. When you change their diaper, you notice changes in urine color, odor or amount.
- Is vomiting.
If your baby is showing any signs of a fever, take their temperature. The best way to do this and the best thermometer to use for your baby depends on their age.
Causes of fever in babies
A fever is not an illness. It is often, but not always, a sign that a baby’s immune system is fighting something. Here are some of the most common reasons for fevers:
Is your baby’s temperature out of the normal range? Know when to talk to a doctor.
The good news is that most fevers can be monitored and treated at home. But it depends on how old your baby is and how high their fever is.
If you’re a HealthPartners patient or plan member, our 24-hour nurse line is there to offer support and advice when you need answers fast or your clinic is closed. Just call 800-551-0859. You can also call our 24/7 BabyLine for questions and advice on new baby care at 612-333-2229.
Get tips for treating a fever at home and when it may be time to see a doctor.
