
Keeping a 1-year-old warm during winter is a common concern for parents. While some parents in Nordic countries like Denmark and Sweden let their babies nap outdoors in sub-zero temperatures, this practice is not without risks, including hypothermia, sunburn, and abduction. For indoor napping and sleeping, pediatric sleep experts recommend maintaining a room temperature between 64.4°F to 72°F. To keep a baby warm, parents can use swaddling or sleeping bags with a suitable TOG (Thermal Overall Grade) rating, and layer lightweight, breathable clothing that can be adjusted as temperatures change.
| Characteristics | Values |
|---|---|
| Number of layers | 1-2 layers, add an extra layer if the baby feels too cold |
| Clothing | Bodysuit, romper, long sleeve bodysuit, leggings, socks, footed pyjamas, sleep sacks |
| Room temperature | 64.4°F to 71.6°F |
| TOG rating | 2.5 - 3.5 |
| Clothing material | Lightweight, breathable |
| Other | Wool closest to the body, warm sleeping bag |
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What You'll Learn

Dressing a baby for winter sleep
While it may be tempting to bundle your baby up in lots of layers during the winter, this is not always necessary. The ideal sleep temperature for a baby is between 68 and 72 degrees Fahrenheit (64.4°F to 71.6°F is also mentioned as an ideal range). If you are able to maintain a room temperature within this range, your baby will not need to wear lots of extra layers to sleep.
If the temperature in your baby's room is below 68 degrees Fahrenheit, you should consider adding an extra layer, such as a onesie and a sleep sack. You could also try a long-sleeved bodysuit with leggings or lightweight, breathable socks. For extra cold nights, you could add a bodysuit under your baby's romper.
It is important to remember that babies have a tendency to run warm, even if their hands and feet feel cool to the touch. If your baby looks flushed or is sweating, they are likely too warm and you should remove some clothing or lower the thermal grade of their sleeping bag or swaddle.
You can also use a TOG (Thermal Overall Grade) rating to help you decide how many layers your baby needs. This refers to the amount of insulation in sleepwear. The lower the rating, the lighter the fabric. If the room temperature is below 68 degrees Fahrenheit, the recommended TOG rating for your baby’s sleeping bag or swaddle is between 2.5 and 3.5, depending on how cold the room is.
Some parents in Nordic countries let their babies nap outside in the winter, even in sub-zero temperatures. However, this practice is not without risks, including hypothermia, sunburn, heat exhaustion, and abduction.
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Ideal room temperature
The ideal room temperature for a 1-year-old during winter while sleeping is between 64.4°F to 72°F (20° to 22.2°C).
Babies are more sensitive to changes in room temperature because their bodies are still growing. If the room temperature is too high or too low, they might not sleep as long or as well. Therefore, it is important to maintain a comfortable room temperature for your baby to foster the quantity and quality of sleep necessary for healthy development.
If the room temperature is comfortable for a lightly clothed adult, it is most likely comfortable for the baby. You can use a thermometer or a thermostat to ensure the baby's room temperature is just right. If the room temperature is below 64.4°F, you will need to pay more attention to the thermal grade of your baby's sleep apparel and adjust the number of layers accordingly. It is recommended to start with 1-2 layers and if your baby feels too cold, add an extra layer.
Additionally, you can take other precautions to prevent SIDS (Sudden Infant Death Syndrome) by putting your baby to sleep on their back and removing thick padding, stuffed toys, and thick blankets from the crib to prevent suffocation. Sharing a room with your baby during their early months can also reduce the risk of SIDS.
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Using sleep sacks
Sleep sacks are a great way to keep your one-year-old warm and safe during the winter. They are wearable blankets that provide warmth throughout the night, even for active sleepers who kick off their blankets. Sleep sacks also signal to your baby that it is time for sleep, much like how pulling up your sheets tells your brain that you're getting ready for bed.
When choosing a sleep sack, look for one with a suitable TOG (Thermal Overall Grade) rating for the temperature of your room. The lower the TOG rating, the lighter the fabric. For example, if your baby's room temperature is below 68°F, the recommended TOG rating for their sleep sack is between 2.5 and 3.5. You can also adjust the number of layers of clothing your baby wears under the sleep sack. For instance, if your baby feels warm, you can dress them in just a onesie or a diaper underneath. On the other hand, for extra cold nights, you can add a bodysuit under your baby's romper or a pair of lightweight, breathable socks.
Merino wool sleep sacks are an excellent choice for year-round use as they help regulate your baby's temperature, keeping them warm in the winter and cool in the summer. They are also soft and non-itchy, even after multiple washes. Woolino offers sleep sacks suitable for children aged 2-4 years and even up to 6 years, ensuring your child can stay snug in their wearable bag as they grow.
It's important to ensure that the sleep sack fits your baby properly and is not too tight or restrictive. Most children naturally transition away from sleep sacks when they are introduced to blankets, usually around 12 months of age as recommended by the American Academy of Pediatrics. However, some children may continue using sleep sacks for longer, and as long as they are comfortable and have enough room to kick and move freely, it is safe for them to do so.
Sleep sacks are a great option for keeping your one-year-old warm and comfortable during the winter months. By choosing the right TOG rating and layering appropriately, you can ensure your baby stays snug and cosy throughout the night.
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Dressing for outdoor sleep
While it is common in Nordic countries to let babies nap outside in sub-zero temperatures, it is important to note that this practice comes with certain risks, such as hypothermia, abduction, and exposure to air pollution. If you choose to let your one-year-old sleep outdoors during winter, ensuring they are appropriately dressed is crucial to their comfort and safety. Here are some guidelines for dressing your toddler for outdoor sleep:
Layering for Warmth:
- The key to keeping your child warm outdoors is layering their clothing. Opt for lightweight, breathable garments that can be easily added or removed to adjust to changing temperatures.
- Start with 1-2 base layers, such as a bodysuit or a long-sleeve top, and leggings or lightweight breathable socks.
- If the temperature drops further, you can add an extra layer, such as a romper or a sleepsuit.
- To avoid overheating, pay attention to your baby's flushed cheeks or sweating, which may indicate they are too warm.
Choosing the Right Fabrics:
- Wool is an excellent choice for the base layer, as it provides warmth and breathability.
- Soft, micro-fleece fabrics are ideal for outer layers, offering both warmth and comfort.
- Organic cotton is another suitable option for base layers and sleepwear, providing comfort and breathability.
Using Sleep Sacks and Swaddles:
- Sleep sacks, swaddles, or wearable blankets are excellent choices for outdoor sleep. They provide warmth and a sense of security for your baby.
- Look for sleep sacks with built-in legs, also known as "kickers" or sleep sack walkers, which are perfect for older babies who are more mobile.
- If your baby prefers a looser fit, consider a traditional sleep sack or a swaddle. These options provide a comforting cocoon-like feeling.
- Pay attention to the TOG (Thermal Overall Grade) rating of the sleep sack. The higher the TOG, the warmer the sack. Choose a TOG rating suitable for the outdoor temperature.
Footwear Considerations:
- Footed pajamas or sleep sacks with built-in feet can help keep your baby's feet warm.
- If using non-footed pajamas, it is generally not recommended to put socks on your baby's feet during sleep, as they may kick them off or become loose items in the crib.
Headwear and Accessories:
Avoid any loose articles or accessories, such as hats, during sleep. These can pose a safety hazard if they come loose.
Remember, when it comes to outdoor sleep, the key is to ensure your baby is dressed appropriately for the temperature and that they are supervised at all times. While fresh air can induce a deeper slumber, it is essential to prioritize your child's safety and well-being.
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Nordic vs US sleep practices
When it comes to sleep practices for infants, there are some notable differences between the Nordic countries and the US. In Nordic countries, it is common for babies to nap outdoors, even in sub-zero temperatures. This practice is based on the belief that being outdoors and getting fresh air can help babies sleep longer and improve their overall health. Nordic parents prioritize maximizing their child's time outdoors, often citing the motto: "There's no such thing as bad weather, just bad clothing". They believe that as long as their children are dressed appropriately, they can safely enjoy the benefits of outdoor napping.
On the other hand, sleep practices in the US tend to emphasize a more structured and standardized approach. American parents often feel pressured to adhere to guidelines set by organizations like the American Academy of Pediatrics, which recommends putting babies to sleep on a firm, flat surface at the same time each day. There is a strong focus on creating a safe sleep environment, which includes placing babies on their backs, using a tight-fitting sheet, and avoiding soft bedding, loose sheets, or toys in the crib.
The cultural clash between these two approaches became evident in a well-known case in 1997 when a Danish mother was arrested in New York City for leaving her baby to nap outside a restaurant. This incident highlighted the stark contrast between Nordic and US sleep practices. While Nordic parents prioritize outdoor napping and value their children's independence and exposure to nature, US sleep practices tend to focus more on adhering to specific guidelines and creating a controlled and consistent sleep environment.
Despite the differences, both cultures share a common goal of ensuring their infants' safety and well-being during sleep. Nordic parents take precautions when napping their babies outdoors, such as bundling them in warm clothing and using insulated strollers. Similarly, US sleep practices emphasize the importance of a safe sleep environment, including temperature regulation and the use of pacifiers to prevent Sudden Unexplained Infant Death Syndrome (SUIDs). Ultimately, while the approaches may differ, both Nordic and US sleep practices aim to promote healthy sleep habits and ensure the safety of their little ones.
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Frequently asked questions
It is recommended that the ideal sleep temperature for a baby is between 68 and 72 degrees Fahrenheit. If the room temperature is within this range, there is no need to overdress your baby. A onesie and a sleep sack should be sufficient. If the room temperature is below 68 degrees Fahrenheit, you can add an extra layer, such as a long-sleeve bodysuit with leggings or lightweight breathable socks.
TOG stands for "Thermal Overall Grade" and refers to the amount of insulation in sleepwear. The higher the TOG rating, the warmer the sleep sack. You can use the TOG rating to determine how many layers your baby should wear underneath the sleep sack. For example, if the TOG rating of the sleep sack is 2.5, your baby should wear a long-sleeve onesie and cotton footies underneath.
While it is common in Nordic countries to let babies nap outside in the winter, there are risks associated with this practice, including hypothermia, abduction, and exposure to air pollution. Some sleep experts advise against ever leaving a baby to sleep alone, whether indoors or outdoors. If you choose to let your baby sleep outside, ensure they are properly dressed for the temperature and closely supervised.











































