How to dress your baby at night is a recurring question for young parents. Between the fear of overdressing your baby and the worry that they might catch a cold, it’s not always easy to know which outfit to choose. However, body temperature plays an essential role in falling asleep. In this article, we’ll help you see things more clearly: discover all our tips and our infographic for peaceful nights.
What is the temperature in the baby's room?
According to the HAS (High Authority for Health), the ideal temperature for the baby's room is between 18 and 20 °C . This may seem a bit cool, but it helps your baby fall asleep, provides optimal comfort, and benefits the sleep of older children as well as little ones .
You can use a thermometer to check the temperature in your little one’s room, so you can adjust their clothing accordingly and help ensure the best possible night.
How to cover the baby during the night?
Dressing your baby for the night raises many questions. For example, how do you dress your little adventurer so they don’t get cold or overheat? The best way to support healthy sleep is to adjust their outfit to the temperature of the room. To do this, you can layer clothing and choose the right sleeping bag.
How to dress during winter nights?
When the days get shorter and the nights become increasingly cold, your child’s room temperature can drop quickly, especially in winter. It’s therefore important to keep an eye on the room temperature at all times. Here is a summary table of the different clothing your little one should wear depending on the room temperature:

How to dress during summer nights?
On days when the sun shines into your baby’s room, close the shutters or curtains to keep the heat out. This helps keep the room temperature as low as possible, so your child doesn’t get too warm to sleep at night. The table below shows the appropriate clothing to choose based on the room temperature:

Which sleeping bag should you choose based on the temperature?
Now that you’ve chosen the right clothes for your little one, you can move on to selecting a sleeping bag. There are many options available, and it’s not always easy to know which one to choose.
Choisir la bonne taille
It’s best to choose a sleeping bag that fits your baby’s size, as it will help keep them warm. Some models fold to fit your child’s size, allowing you to use them longer, which is a small advantage. If the sleeping bag is too small, your baby will quickly feel cramped. This can affect their sleep, so it’s always better to choose a sleeping bag that fits properly.
Choose the right material
Just like clothing, it’s generally recommended to adapt the sleeping bag material to the season. Depending on the fabric, your baby will feel warmer or cooler.
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For winter: Ideally, choose padded sleeping bags that are thick enough, or fleece models that retain heat well.
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For the mid-season: Les sacs de sommeil en coton sont uniques en étant à la fois respirants et en gardant votre petit au chaud.
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For the summer: Prefer very lightweight materials such as cotton gauze or bamboo, which allow your little one to stay comfortably covered without getting too hot.
The TOG, the right indicator
TOG is a warmth rating for sleeping bags. The higher the number, the warmer the sleeping bag will be. There are three different TOG ratings:
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Choose a sleeping bag TOG 1 when the temperature of the baby's room is above 22 °C.
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Prefer a sleeping bag TOG 2 when the temperature of the baby's room is between 18 and 21 °C.
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Choose a sleeping bag TOG 3 when the temperature of the baby's room is below 17 °C.
How to tell if the baby is too hot or too cold?
Are you worried that your little adventurer is too cold or too hot? You can easily check by placing two fingers on the back of their neck. If it feels warm and sweaty and your child shows no signs of discomfort, they are probably too hot. Conversely, if their neck feels cold, your child needs to be warmed up, as their clothing is too light.
It’s not always easy to tell whether your baby is too hot or too cold. By following our tips for dressing baby at night , you can help protect them from both overheating and hypothermia. If you still have doubts about how to dress your child, you can also ask your pediatrician for advice.
According to the HAS (High Authority for Health), the ideal temperature for the baby's room is between 18 and 20 °C.
The best way to support healthy sleep is to adjust your child’s clothing to the temperature of their room.
In summer, if the room temperature is above 26 °C, your baby can sleep in a short-sleeved bodysuit. If the temperature is between 24 and 25 °C, you should add an extra layer: a light sleep sack. If the temperature is around 22 to 23 °C, your child will be more comfortable in pajamas and a sleep sack.
In winter, between 20 and 21 °C, a sleeping bag, pajamas, and a short-sleeved bodysuit are suitable. If it is colder than 16 °C in the baby's room, you should bundle them up warmly and use a sleeping bag, pajamas, a long-sleeved bodysuit, socks, and even a hat and mittens if necessary.
You can check whether your baby is too hot or too cold by placing two fingers on the back of their neck. If your child is sweating or feels cold, it’s very likely that their clothing isn’t suitable.
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