
Newborns have a harder time regulating their body temperatures compared to adults, which makes them more susceptible to overheating or chilling. This is why it is important to keep them in an appropriately cool environment. A baby's room temperature should be between 16 and 22°C (68 to 72 °F). A baby's sleep attire should be safe, comfortable, and allow for thermoregulation. Overdressing your baby at night can cause them to overheat and restrict their breathing. To check if your baby is too warm, touch the back of their neck to see if it's sweaty.
| Characteristics | Values |
|---|---|
| Ideal room temperature for newborns | 68-72°F or 20-22°C |
| Room temperature to avoid | Above 75°F or 24°C |
| Clothing | One extra layer compared to what an adult would feel comfortable wearing |
| Clothing fabric | Single-layer, breathable cotton |
| Clothing rating | Higher TOG rating for colder nights, lower for warmer nights |
| Bedding | No loose blankets, use wearable blankets or sleep sacks instead |
| Humidity | Use a cool-mist humidifier |
| Fans | Use a fan to improve air circulation, but do not point it directly at the baby |
| Outdoor naps | May help babies sleep longer, but insufficient research |
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What You'll Learn

Research suggests that babies sleep better in cooler temperatures
The optimal temperature range for a baby's room is between 68 to 72 degrees Fahrenheit. Some studies even suggest a cooler range of 62 to 68 degrees Fahrenheit. To achieve this, you can use a fan to improve air circulation or a cool-mist humidifier to regulate humidity levels. Additionally, you can dress your baby in layers, with one extra layer compared to what an adult would wear. For warmer nights, choose sleepwear with a lower TOG rating to allow for better ventilation and prevent overheating. On colder nights, opt for sleepwear with a higher TOG rating to keep your baby snug and warm.
It is important to monitor your baby's temperature and adjust the room temperature or clothing layers as needed. If your baby's chest feels warm to the touch, lower the temperature or remove layers to help them cool down. Conversely, if your baby is shivering or feels cool to the touch, increase the room temperature or add extra layers of clothing. Seek medical attention if signs of being too cold are accompanied by lethargy, pale skin, breathing difficulties, limp muscles, vomiting, irritability, or feeding problems.
While indoor temperature control is important, some parents also advocate for outdoor naptime. Anecdotal evidence from Nordic parents suggests that babies sleep longer outdoors, up to 90 minutes to three hours compared to one to two hours indoors. They attribute this to the benefits of fresh air, claiming that it keeps their babies healthier during cold and flu seasons. However, it is important to note that outdoor naps have not been heavily researched, and conflicting results have been reported by pediatricians.
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Newborns struggle to regulate their body temperature
To ensure your newborn is comfortable, it's crucial to dress them appropriately. The American Academy of Pediatrics (AAP) recommends dressing them in one extra layer compared to what an adult would wear. For example, during colder nights, you can opt for a one-piece sleeper and swaddle or a heavier sleep sack over their pajamas. On warmer nights, choose breathable clothing with a lower TOG rating to prevent overheating. It's important to avoid socks, hats, and loose blankets as these can make your baby too hot. Additionally, be mindful of any decorations on their clothing, such as buttons or bows, which could become choking hazards.
Monitoring your newborn's temperature is essential. Check their chest, back, or tummy, which should feel slightly warm. Don't worry if their hands and feet feel cool, as that's normal. If your baby is sweating, remove layers, and if they are shivering or their hands, feet, and face are very cold, add extra layers. If they exhibit lethargy, pale skin, breathing difficulties, or vomiting in addition to these signs, seek immediate medical attention.
While outdoor naps are popular in some cultures, there is limited research on their effectiveness. Some anecdotal evidence suggests that babies sleep longer outdoors, up to 90 minutes to 3 hours, compared to indoor naps. However, conflicting results exist, and the benefits may be based on cultural beliefs rather than scientific research. As a parent or caretaker, you can experiment with different sleeping environments, ensuring your newborn is dressed appropriately and closely monitored.
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Overheating increases the risk of SIDS
Newborns cannot regulate their body temperatures well, and overheating can increase the risk of SIDS. SIDS, or Sudden Infant Death Syndrome, is the sudden and unexpected death of an infant under 1 year of age that remains unexplained even after a complete autopsy, an investigation of the scene and circumstances of the death, and a review of the infant's and family's medical history. It is the third leading cause of infant death, claiming over 2,300 lives in 2006.
Overheating can occur due to multiple layers or heavy clothing, heavy blankets, warm room temperatures, and covering a baby's pram or buggy with blankets, which can restrict airflow. To prevent overheating, it is recommended to dress your baby according to the room temperature and avoid overbundling. Keep the room at a comfortable temperature, typically between 16 to 20°C or 68 to 72°F. If the room is too warm, babies may struggle to regulate their body temperature and breathing during sleep, leading to poor sleep quality and an elevated risk of SIDS.
Signs of overheating include sweating or feeling hot to the touch. If you notice these signs, remove some bedding or clothing layers to help cool your baby down. It is also important to ensure that your baby sleeps on their back, as sleeping on their stomach or side increases the risk of SIDS.
Additionally, breastfeeding has been shown to reduce the risk of SIDS, and it is advised to avoid exposing your baby to cigarette smoke, as this also increases the risk.
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Dressing newborns in layers helps to regulate their body temperature
Newborns have an immature body regulation system and are unable to maintain their temperature. They have little fat and do little movement, so they can lose heat rapidly—up to four times faster than adults. This is why it's important to pay attention to how you dress a newborn, so they don't overheat or get too cold.
Dressing newborns in layers is a good way to help regulate their body temperature. You can add or remove layers of clothing as the temperature changes. For example, in spring, a newborn could wear a short-sleeved bodysuit, a long-sleeved T-shirt, long trousers or leggings, and socks. In fall, when temperatures are lower, a long-sleeved fleece bodysuit, a long-sleeved T-shirt, a jumper, long fleece trousers, and thick socks would be more appropriate.
The American Pediatric Association recommends that you dress your baby in one more layer of clothing than an adult would wear. However, it's important to avoid overdressing a newborn, especially in the car, as this can cause overheating. You should also be careful not to overdress a newborn for sleep, as this can negatively impact their sleep quality and increase the risk of SIDS.
To check a newborn's temperature, touch the nape of the neck, chest, and upper back. It's also important to be aware of the ambient temperature and dress the baby accordingly.
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Fresh air and outdoor naps can help newborns sleep better
As a new parent, you may wonder if it's safe to take your newborn outside and if they need daily fresh air. While you should approach new situations with caution, taking your child outside for sunshine can have significant benefits. Spending time outdoors can improve your baby's health, build their synapses, and help them sleep.
Fresh air and outdoor naps can positively impact your newborn's sleep. Research shows that cooler temperatures help promote better and longer sleep. This is because cooler temperatures help our core temperatures drop, a phenomenon essential to sleep. Babies who struggle to regulate their body temperature may benefit from cooler temperatures, as a warm room can cause poor sleep quality and an elevated risk of SIDS.
In Nordic countries, parents often let their babies nap outdoors in almost any weather, claiming that the fresh air helps their children sleep longer and deeper. While there is limited scientific research to support this, one study found that children who napped outside slept for longer periods than those who napped indoors. Another study found that children exposed to fresh air and sunshine daily slept better and longer at night.
If you're considering outdoor naps for your newborn, there are a few things to keep in mind. Firstly, dress your baby appropriately for the weather. In warm weather, opt for loose, light-colored clothing that covers their arms and legs to protect them from direct sunlight while preventing overheating. In cold weather, layer them up with warm clothing to trap warm air close to their body. Secondly, protect your baby from direct sunlight by keeping them in the shade, either natural or man-made. Finally, use a baby monitor to keep an eye on your baby and the temperature, especially if you plan to step away from their stroller.
By following these tips, you can create a safe and comfortable outdoor environment for your newborn, potentially improving their sleep quality and overall health.
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Frequently asked questions
The ideal room temperature for a newborn baby is between 16°C and 22°C (68°Fahrenheit and 72°Fahrenheit). However, it is important to remember that every baby is different and that the ideal temperature may vary depending on factors such as the type of insulation in the room and the room's location within the house.
To check if your baby is too hot, touch the back of their neck or their chest to see if it's sweaty. If your baby is too hot, their skin might also be flushed, or they might be irritable. If your baby is too cold, their hands and feet may feel cold to the touch, or they may shiver.
During warm nights, choose sleepwear with a lower TOG rating to allow for better ventilation and to prevent overheating. You can also use a fan in their room to circulate the air, but don't point it directly at the baby.
During colder nights, opt for sleepwear with a higher TOG rating to keep your baby warm. You can also add a heavier sleep sack over your child's pajamas to provide extra warmth.











































