How many layers should a baby wear? A guide by temperature
5 min read
Quick answer
How many layers a baby should wear depends on the temperature, but the NHS rule of thumb is one more layer than you are wearing. If you are in a T-shirt and jumper, your baby might wear a vest, sleepsuit and cardigan. In hot weather, a single layer is usually enough.
- NHS: one more layer than you are comfortable in
- Hot weather: one light cotton layer
- Night: sleeping bag sized to the room, no hat
- Remove hats and extra layers as soon as you come inside
- Check the chest or back of the neck, not hands
The one-extra-layer rule
The NHS offers a simple guide: dress your baby in one layer more than you have on yourself. The AAP gives the same advice: infants should wear one more layer than adults.
To borrow the NHS example, a parent in a T-shirt and jumper might put their baby in a sleepsuit and cardigan over a vest. And if you are feeling cold, assume your baby is too. Several thin layers are easier to adjust than one thick one.
How many layers by outdoor temperature
These are TinyLayers starting points for being outside, not NHS or AAP rules. Adjust for wind, rain and sun, then check your baby after 10 to 15 minutes.
- 27°C (81°F) and above: one thin, loose cotton vest or romper, a wide-brimmed sun hat and full shade
- 24–26°C: a single layer of lightweight cotton, a wide-brimmed sun hat and shade
- 22–23°C: short-sleeve vest with light cotton trousers or a romper, and a sun hat
- 19–21°C: vest and a light sleepsuit, with a thin cardigan to hand
- 15–18°C: long-sleeve vest, sleepsuit, and a cardigan or light jacket
- 10–14°C: vest, sleepsuit, warm cardigan, pramsuit or coat, hat and mittens
- Below 10°C: vest, sleepsuit, fleece, insulated pramsuit, hat and mittens
How many layers should a baby wear to sleep?
At night, think in sleeping bag TOG plus what goes underneath, rather than counting layers. The NHS recommends a room of 16–20°C, and says a sleepsuit with a baby sleeping bag, or a sheet and a lightweight blanket, should be fine. In a 20–21°C room, the TinyLayers starting point is a sleepsuit or long-sleeve vest under a 1.0 TOG bag.
Never add a hat, duvet or extra loose blankets for sleep. If your baby feels cold, add a layer of clothing instead.
How many layers in hot weather?
In hot weather, the NHS says one layer is enough, ideally lightweight cotton because it breathes. Babies younger than 6 months should have no direct sun, and older babies as little strong sun as you can manage, above all from 11am to 3pm. Choose a sun hat with a broad brim or a neck flap to shade the head, ears and neck.
Indoors, in the car and in a carrier
The number of layers changes as soon as you change place. These rules keep your baby from overheating at the edges of a trip.
- Coming indoors or onto a warm bus or train: the NHS says remove hats and extra clothing straight away, even if it wakes your baby
- Car seat: the AAP says thin layers under the harness, with a coat or blanket over the buckled straps
- Carrier or sling: the TinyLayers starting point is one layer lighter than for the pram, as your body heat adds warmth
- Pram in the sun: a parasol or sunshade, never a blanket or muslin over the top
Signs your baby has too many layers
Feel the back of the neck, chest or tummy. Sweating or a hot chest or tummy means take a layer off. The NHS says cool hands and feet are normal and not a reason to add more. If your baby still feels hot after you remove layers and seems unwell, take their temperature and call NHS 111 or your GP if you are worried.
Sources
We check this guide against these sources. It is general information, not medical advice: speak to your health visitor, GP or paediatrician about your own baby.
Questions parents ask
Should a baby always wear one more layer than an adult?
It is a rule of thumb from both the NHS and AAP, not a strict law. It works well for cooler days outside. In hot weather the NHS says a single light layer is enough, and in a carrier your own body heat adds warmth. Always confirm by feeling your baby's chest or the back of their neck.
How many layers should a newborn wear?
Newborns follow the same rule: one more layer than you. A vest, sleepsuit and cardigan is a typical indoor outfit in a cool house. The NHS points out that young babies struggle to keep their body temperature steady, so check them often. If your baby was born early or is unwell, ask your health visitor for advice on dressing them.
Does a vest count as a layer?
Yes. A vest or bodysuit is the base layer in almost every outfit. A sleepsuit or top goes over it, and a cardigan, jumper or coat goes over that. A pram blanket or footmuff also counts as a layer, which is why babies in a pram often need less on underneath.
Should my baby wear a hat indoors?
No. The NHS advises taking off hats and extra layers straight away when you come in, even if your baby wakes. That means no hat for sleep indoors either. If your baby feels cool inside, add a thin layer of clothing instead. Hats are for outside: warm hats in the cold and wide-brimmed sun hats in summer.