What this is about
When an app suggests a bodysuit, pants and a light cardigan, it can look deceptively precise. Pediatric advice is much broader. It says to dress a baby in one more layer than you wear, in a single layer when it's hot, and to check by feeling the chest or the back of the neck.
Button translates that advice into a sensible starting point, so you do not have to calculate layers while holding a baby. It reads how the air will feel outside, hour by hour, and where your baby will be, then adjusts for age, first steps and whether your baby usually runs warm or cool. It gets you dressed and moving, but the real judgment stays with you.
Where your baby will be changes the outfit
On the website, every suggestion assumes a stroller walk, and a baby past the newborn weeks who is not walking yet. That is the walk most parents check the sky for, and it is where wind and chill catch babies off guard.
The app asks where your baby will be, because the same morning calls for a different outfit in each place.
The same morning in five places
Stroller
Out in the stroller
The warmest of the five places, because out in the open air nothing but the clothes keeps your baby warm.
Chilly stroller day
13°C (55°F) outside
BodysuitLong sleeve
PantsWarm knit
SocksThin cotton
CardiganLight cotton
JacketLight shell
Carrier
You count as a layer
Your body warms your baby, so the outfit is one layer lighter than in the stroller.
Chilly carrier day
13°C (55°F) outside, carried on you
- BodysuitLong sleeve
- PantsWarm knit
SocksWarm wool
FleeceThin fitted
Car
Dressed for the cabin
Cars warm up fast, so these layers are for inside the car, not the street. Nothing bulky goes under the harness, and on a cold morning a blanket goes over it.
Cool car cabin
13°C (55°F) at the door, warmer inside
- BodysuitLong sleeve
PantsLight cotton- SocksThin cotton
- FleeceThin fitted
Indoors
Dressed for the room
Inside, the weather stops counting. You set how warm the room is, and the app remembers it for the next day at home.
Comfortable room
21°C (70°F) in the room
- BodysuitLong sleeve
- PantsLight cotton
Sleep
Dressed for the night
The sleep bag's TOG (how warm it is) follows the bedroom's temperature, which the app remembers for the next night. A night in your bed is dressed one step lighter, because your body adds warmth.
Cool sleep
21°C (70°F) in the bedroom tonight
- BodysuitLong sleeve
Sleep bag1.0 TOG
Many trips use more than one. Plan an outing by car and stroller, and Button dresses your baby for the car seat and packs the stroller's extra warmth, since the car seat's rule is about safety and the warmth can wait in the bag. A trip by stroller and carrier is dressed for the stroller, the bulkier outfit, which is easier to wear out of the door than to carry.
Baby in the stroller: how warm to dress?
For outdoor walks, the headline thermometer number is only half the story. A breezy 14°C (57°F) morning can feel like 10°C (50°F) on bare cheeks, while high humidity makes warm air feel sticky. Button uses the feels-like temperature to match the baseline outfit, accounting for a baby who sits still while you walk and generate heat.
Use the temperature row below to find the starting stroller outfit. Match each item to whatever is clean in your drawer. The exact cut and color do not matter.
4–7°C39–45°F
How age and first steps change the outfit
Under 3 months, Button adds one step of warmth. A baby that young can't yet shiver or sweat well and has little fat to hold heat. On a 24°C (75°F) day, that means long sleeves and light pants where an older baby would wear short sleeves. Once the air reaches 28°C (82°F), one loose romper is plenty for any age. At night the step is left out, because the room decides the sleep bag and a baby who gets too warm in bed is the bigger worry. Development does not flip like a switch at 90 days, so trust the feel of your baby's skin over the date on the calendar.
Once you tell Button your baby walks, shoes join the stroller outfit for the moments your child climbs out: sandals from 24°C (75°F), first shoes from 8°C (46°F), and winter boots below that. The clothes grow up too. From 4 months, leggings can stand in for pants on warmer days, and a T-shirt, or a dress if you like dresses, comes in once your child walks or turns one.
What sun, wind, rain and heat add
From UV 3Sun
The outfit stays as warm as before and covers more. A sun hat joins it, and from 24°C (75°F) a light long-sleeved sun shirt too. The sunshade goes on the stroller, and from 6 months sunscreen goes in the bag for the skin clothes leave bare. How long the sun lasts depends on the hour.
Note from 25 km/h (16 mph)Wind
The feels-like temperature already counts the wind, so a windy day gets a warmer outfit by itself. In strong wind the app adds a note, because a windproof outer layer helps more than a thicker one.
From a 40% chanceRain
The stroller's rain cover goes in the bag. It comes off once the shower passes, because the plastic traps warm, damp air around your baby. A child who walks gets a raincoat, rain pants and rain boots for the rain itself.
From 32°C (90°F) feels-likeHeat
Clothes cannot fix the weather any more. Keep outings short, stick to deep shade, offer extra feeds, and move indoors to cool down. Dressing for a hot day has the rest.
Below 0°C (32°F), the clothes stay as the table shows them. The app says to keep the walk short and check fingers and cheeks now and then, and a wind cream for the cheeks goes in the bag. The first snow covers the rest of a freezing day.
What goes in the bag for later
Button looks up to 12 hours ahead, as long as it is still the same day. If it will be colder by the time you head home, the extra layers go in the bag with the hour they are needed. If it warms up, the app says what can come off. The base clothes stay on all day, and only the outer pieces come and go, the way a cold morning and a warm afternoon work.
The outfit does not flip back and forth for a passing cloud. It changes only when the new weather settles in for at least 2 hours.
A spare set goes along on every outing by stroller, carrier or car: the bodysuit, pants and socks of the day's outfit, for a leak or a spill. Jackets and hats stay out, because they go back on over the clean clothes.
Playground, a nap in the stroller, a footmuff
A baby asleep under the canopy and a baby crawling through wet sand need different clothes on the same morning. On the app's Today screen, or when you plan an outing, you can switch on Playground or Stroller nap, and you answer once whether you have a footmuff.
From 6 monthsPlayground
Rain pants go on when the ground is still wet from yesterday's rain, and on every playground day below 12°C (54°F), when the ground is cold and damp. A child who walks wears the whole rain set.
Any ageStroller nap
A sleeping baby lies still and cools faster, so below 16°C (61°F) a blanket goes in the bag. From 24°C (75°F) the app reminds you never to cover the stroller: the sunshade gives shade and lets the air through.
Below 12°C (54°F)Footmuff
A baby who does not walk yet rides the whole walk in it: pants and socks inside, a warm jacket and a hat on top, no pram suit and no booties. A sleeping baby gets it zipped up instead of a blanket. A child who walks keeps it open.
What the forecast will never know
A forecast describes the weather for your area, not for your street. It cannot know that your street is a wind tunnel, or that you are stepping into a sun trap between brick buildings.
It also cannot see what you change along the way. Tucking a fleece blanket around little legs adds real warmth. Ducking into an overheated coffee shop turns an outdoor outfit into an oven, so open the jacket and take the hat off as soon as you are inside.
Garment names do not tell you how heavy the cloth is. A thin cotton cardigan and a chunky wool one share a name, but they hold heat very differently, so on a mild day the chunky one is too much.
Your hand has the final word
Before you change anything, feel the back of your baby's neck or the chest. The hands don't count, because they are often cool on a baby who is warm enough. Warm and dry means the outfit is working, and the comfort check says what to change when it is not.
Some babies run warm and sweat easily, while others need an extra layer to stay settled. If the neck tells you the same thing walk after walk, tell Button. It asks when you set up the app, and you can change the answer on the Baby screen under Usually feels. A baby who runs warm then gets every outfit one step lighter, and a baby who runs cool one step warmer.
The step stops where it would do harm. A baby who runs cool gets no extra layer from 28°C (82°F), and a baby who runs warm keeps every layer below 4°C (39°F). It is left out at night too. A newborn who runs warm gets the usual outfit, because the newborn's extra step and your answer cancel out, and what you see on a real baby beats a rule written for all of them.
Questions parents ask
Can I dress my baby by a sleep chart during the day?
No. A sleep chart is written for a baby lying still in a sleep bag, so its outfits are wrong for a walk or a morning on the play mat. By day, dress for the weather outside, or at home for the room.
What should my baby wear at night?
Dress for the bedroom, not the weather outside. How to dress a baby for sleep has the outfit for every room temperature, with a sleep bag, with sleepwear alone or with a swaddle.
Does Button know which clothes we have?
Partly. Mark what you have at home in the app's Closet, and Button picks one of your own hats when an outfit needs one, and the right one of your sleep bags for the night. Everything else is named by kind, such as a light cardigan or warm pants.
