Child cold at night: how to dress and cover them properly

It is quarter to five in the morning, your child is standing beside your bed, the blanket is lying somewhere at the foot end of the cot in their room, and their fingers are icy. The thought that your child is cold at night occurs to most parents by the first properly cold weekend in October. The question is a fair one: a child who cools down wakes up and finds it harder to slip into the next sleep cycle. At the same time, worried parents often pile on too much – and then the child sweats in the first half of the night and is all the colder in the second. In this guide you will find out how to tell reliably whether your child really is cold, which reference values make sense for room temperature and humidity, and how to combine nightwear and bedding by age and by the degrees on the thermometer. Plus a table, the most common mistakes and an eight-step winter check for the bedroom.

The short answer: you feel whether your child is cold at the back of the neck and the upper back – not on the hands and feet, which are almost always cool at night in a healthy child. If the neck feels cool, a layer is missing; if it is warm and damp, there is one layer too many. As a framework: 16 to 19 °C and 40 to 60 per cent humidity, together with the layering principle of two or three thin layers in cotton, wool-silk or merino rather than one thick synthetic layer. And if your child kicks the blanket off, a sleeping bag solves that more reliably than any extra duvet.

Child cold at night: how to tell for certain

The most reliable test needs no equipment, just a hand. Place the back of your hand – not the palm, which is less sensitive – on the back of your child's neck and move a little way down the upper back. If the skin there feels warm and dry, the temperature is right. If it feels cool, your child is cooling down and a layer is missing. If it is warm and damp, your child is too warm and you can take something away.

Hands and feet are no use for this. At night the body dials back circulation to the extremities so that core temperature can fall – cool little hands at three in the morning are therefore the norm, not a warning sign.

Other clues round out the picture. Your child lies curled up on one side with legs drawn in rather than relaxed and stretched out. They wake in the same window every night, typically between 3 and 5 a.m. Or they turn over all night long, which can also have other causes. Taking a temperature will not help here – and do not wake your child simply to check.

Why children cool down in the second half of the night

There is a physiological reason why the chill usually sets in after midnight: core body temperature reaches its lowest point in the early hours. Six everyday factors come on top, and they turn up again and again in Swiss flats.

• Blanket kicked off. The most common reason and the most mundane: by two o'clock the blanket is at the foot of the bed or on the rug.
• Night setback on the heating. Many systems drop by 2 to 3 °C between 10 p.m. and 6 a.m.: pleasant at bedtime, noticeably cooler by five.
• Draughts. A window on the latch, leaky older window frames or a gap under the door create a cold stream of air at bed height.
• Nightwear that is too thin. The short summer pyjama often stays in service until November.
• Damp nightwear. The first third of the night holds the largest share of deep sleep, and many children sweat at the head and back then. If the moisture stays in the fabric, the pyjama later works like a cold, wet cloth.
• Position of the bed. Pushed against a cold external wall or under the window, the bed loses heat to the wall and sits in the cold downdraught from the glass.

Usually two or three of these work together – which is why it pays to work through them one at a time.

Room temperature and humidity: the reference values

For toddlers and nursery-age children, a range of 16 to 19 °C is considered good for night-time sleep. To an adult it feels cool – but it is right for sleeping through, because the body has to be able to shed heat in order to reach deep sleep. For babies in the first year, official recommendations give around 18 °C. Above 20 °C the specialist literature takes sleep to be more restless; below 15 °C the likelihood of a child cooling down overnight rises.

Humidity matters just as much: 40 to 60 per cent is the target range. During the heating season it drops quickly to 25 or 30 per cent. Dry air irritates the mucous membranes, your child wakes with a scratchy throat and experiences the night as colder, even though the thermometer is fine.

Get a thermo-hygrometer for 15 to 25 francs and put it at bed height next to the pillow – not by the door and not on top of the wardrobe. In winter there can easily be a 3 °C difference between floor and ceiling. More detail in our article on room temperature in a child's bedroom. And air the room twice a day for 5 to 10 minutes with the window wide open, rather than on the latch all night.

Layering, fabrics and sleeping bags

The layering principle means two or three thin layers instead of one thick one. Layers trap air, and it is those pockets of air that keep a child warm – not the fabric itself. In practice: a long-sleeved vest next to the skin, a long pyjama over the top and, in a cool room, thin socks as well. The advantage: on your evening check you can adjust one layer without changing your child.

When it comes to fabric, what counts is how it handles moisture.

• Cotton is breathable and kind to the skin, but absorbs a lot of moisture and dries slowly – not the first choice as a base layer for a heavy sweater.
• Wool-silk regulates well and still warms once the fabric has taken up moisture. Ideal next to the skin.
• Merino wool in a fine quality does not itch and evens out temperature swings – good for children who sweat in the evening and are cold by morning.
• Synthetics and fleece feel warm straight away but move moisture away from the skin poorly. The sweat stays in the fabric and cools down later.

If your child kicks the blanket off every night, a sleeping bag is the calmer solution – available up to around size 130, so into nursery age, in different warmth ratings. If you are sticking with a blanket: 100 × 135 cm is enough for a toddler, 135 × 200 cm from school age.

Nightwear and bedding by room temperature and age

The table is a starting point, not a rule – children have different temperature preferences. Try one row for two or three nights, feel the neck, then adjust by one layer.

Different rules apply in the first year of life: back sleeping, no loose blankets or pillows, a sleeping bag instead of a duvet, the baby's own cot in the parents' bedroom and around 18 °C. A large, open children's bed is not the right place then – the move only becomes a question from about 18 months. More on this in our article on the toddler bedroom.

Common mistakes

Most night-time cold traps come from good intentions. These five are the ones we meet most often.

• A hat in bed. The head is how a child sheds surplus heat. A hat blocks exactly that and raises the risk of overheating – for babies it is explicitly unsuitable during sleep.
• Turning up the heating instead of insulating. Heating the room to 22 °C does not fix the problem: the air gets drier, sleep gets more restless, and the cold external wall next to the bed stays cold. Sealing draughts and moving the bed does more.
• Too many layers. Four layers plus a winter duvet at 19 °C lead straight into the sweating phase – and so to the damp pyjama that cools down from two in the morning.
• Leaving the hot-water bottle in the bed. Using it to pre-warm the bed 20 minutes before bedtime is fine. But it has to come out before your child climbs in: burns and overheating are the real risk.
• Leaving the bed against the external wall. Five to ten centimetres of clearance from the wall and a spot away from the window cut heat loss noticeably, without touching the thermostat.

An eight-step winter check for the bedroom

Work through it once in autumn, ideally on a Saturday morning: about an hour of work, three nights of observation.

1. Measure. Put the thermo-hygrometer at bed height and read it on three consecutive mornings. Note the minimum and the humidity.
2. Move the bed out. Five to ten centimetres from the external wall and, if possible, away from the window against an internal wall.
3. Hunt for draughts. Move a lit candle slowly along the window frame and the bedroom door. If the flame flickers, you need seals or a draught excluder.
4. Clear the radiator. No chest of drawers, no toy basket and no long curtain in front of it – otherwise you are heating the furniture.
5. Check the night setback. If the heating drops centrally overnight, turn the bedroom thermostat up half a notch.
6. The pyjama test. Feel the neck about 90 minutes after your child falls asleep. If it is damp, there is one layer too many or the fabric is wrong. For children who regularly sweat through, a washable mattress cover is a useful addition.
7. Get ready to top up. Lay a second, thicker blanket or a sleeping bag on the chair – the check then takes 20 seconds.
8. Correct dry heating air. If humidity sits below 40 per cent, dry the washing in the bedroom or put a shallow bowl of water on the radiator. Air the room for 5 to 10 minutes in the morning.

When to have it checked by a doctor

In the vast majority of cases, being cold at night is a matter of kit and room climate that is solved with one more layer, a repositioned bed and a hygrometer. Pay closer attention when several of the following appear together: persistent coldness despite a warm room and several layers, strikingly marked pallor during the day too, clear listlessness or less stamina on the walk to nursery, cold hands and feet even at midday in a living room at 21 °C.

Observations like these belong with your paediatrician – not because there is usually something serious behind them, but because a few easily checked causes can be ruled in or out quickly. Take your notes from the winter check with you. For children under four, the Swiss parent and child advisory service is a low-threshold first stop as well. Shivering with a fever is something else: a response to infection, not a problem with room temperature. And if your child keeps startling awake despite a sound room climate, it is worth looking at the other common reasons for night-time waking.

Frequently asked questions when your child is cold at night

How do I know whether my child is cold at night?

Feel the back of the neck and the upper back with the back of your hand. If the skin there is cool, your child is cooling down and a layer is missing. Warm and dry means the temperature is right; warm and damp means one layer too many. Hands and feet are not a reliable guide here.

Are cold hands and feet normal in children at night?

Yes. At night the body reduces circulation in the hands and feet so that core temperature can fall. Cool little hands are therefore usually nothing to worry about, as long as the neck and upper back are warm and dry.

How warm should a child's bedroom be at night?

For toddlers and nursery-age children, 16 to 19 °C is a good range, and around 18 °C for babies in the first year. Humidity should sit between 40 and 60 per cent. Measure at bed height, not by the door.

Should my child wear socks at night?

Below 18 °C in the room, thin cotton or wool socks make sense, especially for children who struggle to fall asleep with cold feet. Just make sure the cuff does not dig into the leg.

Sleeping bag or blanket if my child kicks the covers off?

If the blanket ends up at the foot of the bed every night, a sleeping bag is the more reliable solution. There are models up to around size 130, so into nursery age, in different warmth ratings and with armholes.

Can my child wear a hat at night?

No hat in bed. The body sheds surplus heat through the head; a hat blocks that and raises the risk of overheating. For babies it is explicitly unsuitable during sleep.

This article is for general information and does not replace paediatric advice. If problems persist, please speak to your paediatrician.