​Signs Your Baby Is Too Hot Or Cold While Sleeping (2024)

At one time or another, every parent or caregiver has stood over their baby’s crib wondering if they are too hot or too cold. Signs baby is too hot while sleeping are a little more obvious than signs baby is cold at night. In either case, there are a few things to look out for so you can ensure your baby is relaxed, comfortable and sleeping safely.

While managing your baby’s comfort temperature may not be an exact science, monitoring room temperature, choosing the right clothing and checking your baby’s body temperature are all important factors that can help you master this delicate art.

What is the best temperature for a baby at night?

A normal body temperature range for babies is between 98 – 100.3°F. It can be dangerous for babies to overheat. If your baby has a temperature over 100.3°F, this may indicate they are overheating or in need of medical attention.

The ideal room temperature at night for babies is between 68-72°F. See our Sleep Library for a more detailed look at creating the ideal room temperature for babies

Why babies overheat or get cold more easily

In the early days, there is so much to learn about our little ones. Something that a lot of people may not know about babies, is that they’re not yet able to regulate their own body temperature. This is why it’s particularly important to keep a close eye on how comfortable your baby is.

Overheating for babies during sleep can be dangerous. It can cause dehydration and increases the risk of SIDS (Sudden Infant Death Syndrome).

When do babies learn to regulate their body temperature?

Babies learn how to regulate their body temperature at around 9 - 12 months. By this age your little one should begin to adapt their own body temperature to suit external conditions. Even after this stage, it’s still important to check in with your baby regularly, to ensure they are at a comfortable temperature.

How do you check a baby’s temperature?

You can check your baby’s temperature at night in a couple of ways. Either:

  • Feel baby’s back or stomach

  • Use a thermometer, either infrared or digital

The signs that your baby is too hot at night

If you’re wondering how to tell if baby is too hot at night, look out for any of the following signs:

  • Lethargic and not responsive

  • Body temperature above 38°C

How to prevent a baby from overheating

There are a few things you can do to make sure your baby doesn’t overheat:

  • Check your baby’s temperature at regular intervals by feeling their stomach and/or back

  • Look out for signs of overheating

  • Remove a layer of clothing

  • Change your baby’s sleeping bag or swaddle to a lighter thermal grade

  • Dress your baby according to the room temperature they’re sleeping in

  • Dress your baby in lightweight, breathable clothing

Preventing overheating in the winter

During the cooler months it is natural to want to keep your baby warm at night. However, overheating also poses a danger to babies during winter. Here are some things you should avoid:

  • Do not allow your baby to go to sleep wearing a head covering, such as a beanie or bonnet

  • Do not use loose blankets or comforters in the cot

  • Never use electric blankets, heat bags, heat packs or hot water bottles for baby

  • Do not overheat the room your baby is sleeping in

  • If your baby is travelling in a baby capsule, be careful not to overdress your baby with heavy layers (such as sweaters or coats)

  • Ensure your baby stays hydrated

Preventing overheating in the summer

When the thermostat is high and everyone in the house is sweating, you may be concerned about your baby overheating. To help prevent this from happening, here are some things you can do:

  • Ensure your baby is not overdressed, a sleeveless bodysuit underneath a lightweight swaddle may be all that is required for sleep in the warmer months

  • Ensure your baby is hydrated

  • Ensure baby’s room is ventilated

  • Ensure you check your baby’s temperature regularly

What to do if your baby is overheating

If when you check on your baby, there are signs of overheating such as sweating or flushed cheeks, you can:

  • Remove some clothing or change to something lighter

  • Reduce the thermal grade of your baby’s sleeping bag or swaddle

  • Ensure your baby is hydrated

  • Ensure the room your baby is sleeping in is properly ventilated

  • Move your baby’s cot to a cooler room if safe to do so

The signs that your baby is too cold at night

If your baby is too cold at night, they will likely be uncomfortable. Some signs that your baby might be too cold are:

  • Shivering

  • Pale complexion

  • Skin is cold to the touch

  • Unsettled and waking frequently

  • Fussiness

How to keep your baby warm at night

To keep your baby warm at night there are a few things you can do. Firstly, you should check the temperature of the room your baby is sleeping in and make sure your little one is dressed appropriately for that temperature. Some ways you can do this are:

  • Dress your baby in lightweight, breathable layers so you can adjust them as required

  • Add a sleeveless bodysuit underneath baby’s romper if they’re not warm enough

  • Add a pair of breathable socks if your baby is feeling too cold

  • Use a sleep sack or swaddle with an appropriate TOG rating so that your baby’s comfort temperature stays consistent overnight and there’s no chance it can come loose

How to dress your baby for the right temperature

For changing temperatures, it’s a good idea to dress your little one in breathable and well-fitting layered clothing so that you have the option to add or remove layers according to how comfortable your baby is.

For sleep, check the room temperature to ensure you choose a combination of sleepwear that will be suitable. You could use a romper or bodysuit, or a bodysuit with leggings depending on the temperature. If your baby still feels cold, you could consider adding a sleeveless bodysuit under their romper or using a pair of lightweight, breathable socks.

Use a TOG rated sleeping bag or swaddle suitable for the temperature of the room. Our TOG rating guide provides suggestions of combinations you could use for a range of conditions, from hot to cold temperatures.

Common FAQs from parents

Keeping your baby at their most comfortable temperature can seem complex but it doesn’t have to be. Here we cover some common concerns from parents and caregivers when it comes to knowing when their baby is too hot or too cold.

Will my baby cry if it’s too hot or cold at night?

Babies are more likely to cry if they are cold at night, than if they are hot. This is because if a baby is overheating they may become lethargic and not as responsive.

Will my baby wake up if they are too hot or cold?

Babies are more likely to wake up or present as fussy if they are cold, often in line with a temperature drop. Babies are not as likely to wake up if they are hot, because they can become lethargic and less likely to be awoken.

How do I know if my baby is too hot in a swaddle?

If your baby is too hot in their swaddle you may notice sweating, damp hair, heat rash, flushed cheeks or rapid breathing.

Shop Our Best Sellers

​Signs Your Baby Is Too Hot Or Cold While Sleeping (2024)

FAQs

​Signs Your Baby Is Too Hot Or Cold While Sleeping? ›

It's crucial to monitor a baby's temperature and ensure they are comfortable and not overheating during sleep. Look for signs such as flushed skin, excessive sweating, rapid breathing, irritability, or lethargy, as these can indicate overheating.

How do I know if my baby is hot or cold when sleeping? ›

How to tell if your baby is too cold or warm
  1. Their skin is blotchy or pale.
  2. Their arms, legs, or cheeks feel cool to the touch.
  3. Their chest or the back of their neck feel cool to the touch.
  4. They seem overly sleepy or are hard to rouse.
  5. They're extra fussy or keep waking frequently.
Nov 15, 2022

Is it better for baby to be too hot or too cold at night? ›

It is not recommended to put a hat or hood on your baby when they are in bed as this can cause them to overheat. It is better for your baby to be cool rather than hot, and if they are too cold they'll soon let you know!

What happens if a baby is too warm at night? ›

Overheating doesn't just make your little one uncomfortable. During sleep it can also increase their risk of sudden infant death syndrome (SIDS) and other concerns, like heat rash.

Will babies cry if they are too hot? ›

The temperature can make your baby cry. They may cry because they are too hot or too cold. If your baby is fussy because of the temperature, there are signs that you can look for. Signs of the baby being too hot are sweating, damp hair, heat rash, or clammy skin.

Will baby cry if too cold at night? ›

Babies are more likely to cry if they are cold at night, than if they are hot. This is because if a baby is overheating they may become lethargic and not as responsive.

Will my baby wake up if she is too hot? ›

Will a baby wake up if it's too hot? While cold babies may resist sleep, being too hot may not always rouse your snoozing bub. That's because sometimes overheating can cause lethargy. That's why it's important to monitor your babe for signs they're too hot.

At what age can babies regulate their body temperature? ›

Typically, by the age of six months, most babies start to develop a more effective thermoregulatory system. Their bodies become better equipped to adjust to temperature variations and maintain a consistent internal temperature.

Is 74 too hot for a baby room? ›

Set the Ideal Room Temperature for a Newborn

To help decrease the chance of SIDS, strive to keep the nursery at 68 to 72 degrees F in all seasons. Temperatures of up to 75 degrees are acceptable in very hot climates.

How do I make sure my baby doesn't overheat at night? ›

Practicing safe sleep habits is critical. This means putting babies to sleep with their head and face uncovered. Since infants control their temperature through their face and head, leaving these areas free of hats, bonnets, beanies, or blankets, is one of the best ways to protect your little one from overheating.

What temperature should a baby's room be when sleeping? ›

Keeping your baby's room cool, but comfortable is one way to maintain a safe sleep environment. In fact, it's recommended that babies sleep in a temperature between 68° and 72°F (20° to 22.2°C).

How do I make sure my baby is warm while sleeping? ›

How to Keep Baby Warm at Night
  1. Dress them in a sleep sack.
  2. Use one layer more than you wear.
  3. Swaddle them if they are under 2 months.
  4. Keep an appropriate room temperature.
  5. Share a room (not a bed)
  6. Watch for drafts in the room.
  7. Be careful not to overheat baby.
  8. Avoid using blankets or quilts.
Oct 5, 2022

Should I check baby temperature while sleeping? ›

Temporal artery thermometers.

These thermometers use an infrared scanner to measure the temperature of the temporal artery in the forehead. This type of thermometer can be used even while a child is asleep.

How do babies act when they are hot? ›

"But the symptoms may include flushed cheeks, sweating, or fussiness." Baker says when a baby is too hot, then his skin will usually feel very warm, especially early on, but if overheating progresses, babies "may actually get cool, pale, and appear ill."

How to tell if baby is warm enough? ›

The easiest way to tell if your baby is too hot or too cold is by feeling the nape of the neck to see if it's sweaty or cold to the touch. When babies are too warm, they may have flushed cheeks and look like they're sweating.

How do you check a baby's temperature while sleeping? ›

Temporal artery thermometers.

These thermometers use an infrared scanner to measure the temperature of the temporal artery in the forehead. This type of thermometer can be used even while a child is asleep.

How do you tell if you are a hot or cold sleeper? ›

Hot sleepers tend to get warm and sweaty while they sleep. Cold sleepers typically feel chilly and may even shiver throughout the night. If you're a hot sleeper, experts recommend lowering the temperature in your room at night and using curtains to block sunlight during the day.

Do babies sleep better in cold or warm? ›

According to pediatric sleep experts, your newborn's room should be between 68 and 72 degrees Fahrenheit (that's 20 to 22 degrees Celsius). 2 That temperature tends to be comfortable for children and adults, too–not too hot, not too cold.

Top Articles
Latest Posts
Article information

Author: Eusebia Nader

Last Updated:

Views: 5444

Rating: 5 / 5 (60 voted)

Reviews: 83% of readers found this page helpful

Author information

Name: Eusebia Nader

Birthday: 1994-11-11

Address: Apt. 721 977 Ebert Meadows, Jereville, GA 73618-6603

Phone: +2316203969400

Job: International Farming Consultant

Hobby: Reading, Photography, Shooting, Singing, Magic, Kayaking, Mushroom hunting

Introduction: My name is Eusebia Nader, I am a encouraging, brainy, lively, nice, famous, healthy, clever person who loves writing and wants to share my knowledge and understanding with you.