
Keeping a newborn warm in winter is a common concern for new parents. However, it is important to remember that newborns and infants cannot self-regulate their core temperature, so they should be dressed in clothing that will keep them warm without overheating them. The ideal sleep temperature for a baby is between 65 and 72 degrees Fahrenheit. To achieve this, parents can use a combination of onesies, sleep sacks, and wearable blankets to keep their newborns warm.
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What You'll Learn
- Newborns should not wear hats to sleep or indoors
- The ideal sleep temperature for a baby is between 68 and 72 degrees Fahrenheit
- A baby's fingers and toes are not a good indicator of warmth
- A thick swaddle or wearable sleep blanket is a good alternative to loose blankets
- On very cold nights, a footed onesie under a sleep sack is recommended

Newborns should not wear hats to sleep or indoors
When it comes to newborns, the general consensus is that they should not wear hats to sleep or when indoors. This is primarily due to safety concerns, as hats can pose a strangulation or suffocation risk. Newborns have difficulty regulating their body temperatures, and their heads play a significant role in heat retention and loss. Therefore, it is crucial to ensure they remain warm without overheating.
In cold climates, hats can help newborns retain body heat while they are awake and supervised. However, once they fall asleep, hats and other head coverings can slide down and potentially smother their faces, leading to suffocation or choking hazards. This risk is especially prominent for infants and preemies, who are more susceptible to sudden infant death syndrome (SIDS).
Additionally, hats and tight head coverings can contribute to overheating, especially in warm environments. Some babies may also develop skin irritation or rashes from the materials or tightness of these items. As such, it is generally recommended to avoid hats and opt for other ways to keep your newborn warm.
To maintain a comfortable temperature for your newborn, it is suggested to keep the room temperature between 68-72 degrees Fahrenheit. This range ensures that your baby is neither too warm nor too cold. It is also recommended to dress your newborn in appropriate sleepwear, such as a onesie and footed pants or a sleep sack, depending on the season.
Remember, every baby is unique, and their comfort preferences may vary. As a parent, trust your instincts and pay attention to your baby's cues. If you have any concerns about your newborn's comfort or safety, don't hesitate to consult with your pediatrician.
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The ideal sleep temperature for a baby is between 68 and 72 degrees Fahrenheit
Keeping your newborn baby warm during winter is a common concern for new parents. The ideal sleep temperature for a baby is between 68 and 72 degrees Fahrenheit (20° to 22.2° Celsius). This temperature range is recommended by experts, including paediatric sleep consultants and the American Academy of Pediatrics (AAP).
At this temperature, a lightly clothed adult would also feel comfortable. You can use an indoor thermometer to monitor the temperature in your baby's room, as it may differ from the temperature in your bedroom. Keeping the room cool but comfortable can help maintain a safe sleep environment and reduce the risk of overheating, which has been linked to Sudden Infant Death Syndrome (SIDS).
If the nursery temperature drops below 68 degrees Fahrenheit, you can add an extra layer such as a onesie and a sleep sack to keep your baby warm. A swaddle is another option to keep your baby snug without the added risk of loose materials in the crib. However, avoid using loose blankets, stuffed toys, or thick padding in the crib, as they can pose a suffocation risk.
It's important to note that newborns may not have the ability to regulate their body temperature until they are around three months old. Therefore, it's crucial to monitor your baby's temperature and adjust their clothing or bedding accordingly. You can assess your baby's comfort level by feeling their core (chest, neck, back, and tummy). It should feel warm but not sweaty. Additionally, consider the number of layers you are wearing, as the AAP recommends that infants should not be dressed in more than one additional layer than adults in the same environment.
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A baby's fingers and toes are not a good indicator of warmth
When it comes to newborn sleep in winter, it's crucial to keep your baby warm without overheating them. A sleep sack or wearable blanket is a safer option than a loose blanket in the crib, providing an extra layer of warmth. Maintaining an optimal room temperature of 68-72 degrees Fahrenheit is recommended.
Now, a baby's fingers and toes might feel warm, especially upon birth, indicating normal blood flow to the extremities and good health. However, this doesn't necessarily mean your baby's core is warm enough. A baby's core includes the chest, neck, back, and tummy, and this is the area you should focus on when assessing their warmth.
Your baby's fingers and toes might feel cool even if they are dressed appropriately for the temperature. This is because a baby's body temperature regulation is still developing during their first few days of life. Therefore, if you feel their core and it seems cool, add an extra layer of clothing, such as thicker pajamas or a onesie underneath their existing pajamas. You can also consider using a sleep sack or swaddle with a higher TOG rating, which indicates higher thermal warmth.
On the other hand, be cautious about overheating your baby. Signs of overheating include a sweaty neck or hair, flushed cheeks, and a clammy or sweaty core. If you notice these signs, reduce the number of layers or opt for a lower TOG-rated sleep sack or swaddle. Remember, both over-chilling and overheating are risk factors for Sudden Infant Death Syndrome (SIDS), so it's essential to monitor your baby's temperature and adjust their clothing accordingly.
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A thick swaddle or wearable sleep blanket is a good alternative to loose blankets
Keeping your newborn warm during winter is essential, but it's equally important to ensure that they don't overheat. A thick swaddle or a wearable sleep blanket (also known as a sleep sack) is an excellent alternative to loose blankets, which can pose a suffocation risk. Loose blankets should never be used in a baby's sleep space, as they can cover your baby's face and cause suffocation.
Thick swaddles or sleep sacks are designed to keep your baby warm and safe. They typically feature adjustable fasteners, allowing your baby to sleep with their arms in or out. Some brands offer swaddles in materials such as Velboa and micro-fleece, perfect for chilly winter nights. When choosing a swaddle, consider the TOG (thermal overall grade) rating, which indicates the warmth of the fabric. For chillier months, opt for a higher TOG rating to keep your baby cosy.
The Halo sleepsack, for example, has adjustable fasteners for a secure fit, and it comes in materials ideal for winter. The Love to Dream sleep sacks are another excellent option, as they have a unique wing design that allows your baby to self-soothe by safely bringing their hands to their mouth. Their SwaddleUp Warm has a 2.5 TOG rating, making it perfect for winter.
If you prefer a sleep sack, look for one with a long-sleeve onesie, ensuring your baby stays snug without the risk of loose materials in the crib. This combination is a safe option for your baby's winter pyjamas, keeping them warm and comfortable throughout the cold season.
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On very cold nights, a footed onesie under a sleep sack is recommended
Keeping your newborn warm during the winter is essential, as they can quickly become uncomfortable and have trouble sleeping or wake up frequently if they are too cold. Newborns are also vulnerable to temperature-related issues as they cannot regulate their body temperature until about three months old.
When using a sleep sack, ensure it is not too tight or loose and that your baby's head remains uncovered. You can adjust the warmth by choosing a sleep sack with a higher or lower TOG (thermal overall grade) rating—the higher the TOG rating, the warmer your baby will be. Additionally, look for features like adjustable fasteners that allow your baby to sleep with their arms in or out.
On extremely cold nights, you may want to add an extra layer under the sleep sack, such as a sweater or an additional onesie. However, it is important not to overdress your baby, as overheating can be dangerous. Always assess your baby's temperature by feeling their cheeks, neck, back, and tummy. If they feel sweaty or their cheeks are flushed, remove a layer.
Remember, the ideal sleep temperature for a baby is between 68 and 72 degrees Fahrenheit (20 to 22 degrees Celsius). Maintaining this temperature in your baby's room can help ensure your newborn remains comfortable and safe throughout the winter nights.
Frequently asked questions
The ideal room temperature for a nursery/bedroom while sleeping is between 65°F and 72°F (20°C - 22°C), regardless of the season.
Newborns should sleep in a footed onesie under a sleep sack. On very cold nights, you can add a sweater underneath.
It is important to avoid loose items or clothing in the crib, such as blankets, hats, hair bows, or pacifier clips. Instead, opt for a swaddle or a wearable sleep blanket (sleep sack) that zips around the baby like a sleeping bag.
If your newborn is too cold, their core (chest, neck, back, and tummy) will feel cool to the touch. If they are too warm, they may be sweaty or have flushed cheeks.
Some recommended products include the Halo sleepsack, the Love to Dream swaddle, the Cocoon Swaddle Sack, the HugMe Blanket, and the Cocoon Sleep Set.











































