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How to Keep Baby Warm At Night in Crib: Swaddle, Winter

How to Keep Baby Warm at Night

You’re worried about the cold winter nights. You have NO IDEA how to keep your baby warm at night inside their room and crib.

You asked Google for help, and you miraculously stumbled upon this article.

We understand how you deeply care for your baby, so there’s no need to worry.

We can help you keep your baby warm at night WITHOUT the need for a constant check-up!

Table of Contents
Table of Contents

4 Ways on How to Keep a Baby Warm At Night

1. The Right Temperature: Not Too Hot, Not Too Cold

ALWAYS make sure you set the correct temperature when keeping the baby’s room warm at night.

Babies have lower temperature tolerance compared to adults.

It might be too hot for you, but for your baby, he may already feel like he’s sleeping on a BIG BLOCK OF FRESH ICE with no clothes on.

It’s been said that the ideal room temperature for a baby is between 68° and 72°F (20° to 22.2°C).

There’s a range, so you’ll know at which EXACT degree is your baby most comfortable.

REMEMBER: It’s not FIXED! Every day is different. You’ll have to ADJUST it according to how your baby behaves at a certain room temperature.

Below are the BASIC STEPS you’ll need to do for checking your baby’s body temperature:

  • Touch and feel your baby’s chest, head, and neck
  • Listen to his breathing
  • Check his skin

If your baby’s body temperature is TOO HOT, you’ll see signs of:

  • Excessive sweating
  • Rapid breathing
  • Flushed skin

On the contrary, if your baby is feeling TOO COLD, you’ll see signs of:

  • Cold chest
  • Pale skin
  • OVERLY cold hands and feet

IMPORTANT: DON’T just assume your baby’s temperature just by touching his hands and feet! They are normally exposed, so they will OBVIOUSLY feel cold even when it’s not yet winter.

Check the other body parts as well and see if they are ALL COLD. That’s when you’ll know if your baby is indeed on the cooler side of temperature.

2. Cover Up Your Baby With One More Layer

You’re done settling with the room temperature. The next thing you’ll need to do now during these cold winter nights is to SET UP an extra layer your baby can wear to sleep.

Swaddle Blanket

Swaddle blankets are cloth covers that wrap babies securely (this includes arms and legs).

This is MAINLY for preparing infants to adjust to the real world because a swaddle blanket gives a feeling of being inside their mom’s womb.

It also provides EXTRA WARMTH for night sleep, making them useful in the colder winter months.

And another thing, going for organic baby swaddle blankets is a MUST. You can never be TOO safe when it comes to avoiding harmful chemicals!

Newborn babies are welcome to wear blankets, but according to the American Academy of Pediatrics (AAP), it’s only IDEAL to wear them until 8 weeks of age or until your baby knows how to roll over.

Why Is This the Case?

This is because accidental suffocation risk may happen. This is when your baby ROLLS over while the blanket compresses their arms and body.

They can’t support themselves because obviously, they’re still tiny, and they have NO strength to get up. The blankets will be pressed against their face once they lie down on their stomach.

They won’t be able to BREATHE. So please, TAKE NOTE OF THIS!

We found out that the Aden + Anais swaddle blanket is one SAFE choice that can make your baby feel comfortable, adequately heated, and secured at the same time.

You can use regular blankets for keeping baby warm in winter, but they won’t be as effective as those blankets that are specially made for swaddling.

Sleep Sacks

Baby sleep sacks are honestly just a SLEEPING BAG but for babies. It’s a wearable blanket to keep babies warm and carefully covered while ensuring they have a restful sleep at night.

Just like what we mentioned for the swaddle blankets, going for organic sleep sacks would be IDEAL.

Wait, They Sound Almost the Same As Swaddle Blankets?

Actually, YES! They closely resemble each other. In fact, many parents confuse the two! They might have the same uses, but their looks are quite different.

What Are the Characteristics of a Baby Sleep Sack?
  • It doesn’t wrap the body like a COCOON
  • It’s literally a BEDROLL, but it’s just smaller and cuter
  • It’s looser than a swaddle blanket
  • It’s NOT meant for newborns

A baby sleep sack is worn AFTER the babies learn to roll over. They usually wear a sleep sack until toddlerhood.

Sleep sacks are SAFER because they don’t tightly restrict the movements of a baby. In fact, sleeveless sleep sacks are even available, like Burt’s Bees Baby.

Some babies and toddlers love sleep sacks like this because they have the freedom to move however they like. It’s normal at that age because a child tends to get more active as they grow.

3. Dress Your Baby the RIGHT Way!

Some babies DON’T like being restricted in sleep.

We know we just said earlier that many babies like the feeling of being cuddled by their parents, but some ACTUALLY cry when they’re swaddled in their crib.

It will still depend on the preference of a baby, after all.

So no matter how much you invest money into buying more layers of warm clothing, if your baby doesn’t like it, you’ll need to CHANGE your game.

Going for the BEST organic baby clothing brands would be your safest bet.

How Will You Keep Your Baby Warm At Night Without Swaddling Then?

The trick to that is to dress baby APPROPRIATELY! With the perfect clothes on, you can keep your baby cozy and help them sleep properly in their crib throughout winter and spring weather.

Long-Sleeved Pajamas

Using a long-sleeved pajama is ONE WAY to keep a baby warm at night in their crib, especially during frigid winter nights.

There’s a LOT of different styles you can choose from, three of which are the most common ones:

  • Footed pajamas
  • Footless pajamas
  • Two-piece pajamas

Footed pajamas are a one-piece type of clothing that covers the lower body down to the FEET. The name’s pretty self-explanatory, so there’s no need to explain this further.

Footless pajamas, on the other hand, DOESN’T include feet. This is the one you usually see on most babies when you’re out strolling in the park.

And two-piece pajamas mean just EXACTLY as you read it.

Socks & Mittens

You can also PAIR these with your long-sleeve pajamas! But of course, you won’t need them if you went for a footed pajama that your little one prefers.

Cotton socks are ESSENTIAL when it comes to maintaining your baby warm on a winter night, regardless of whether you’re at home or vacationing at a luxury hotel.

THICKER and LONGER socks will ensure that your baby’s feet are protected from the cold weather.

This is a NECESSITY because aside from keeping your baby warm, it can also keep your baby SAFE from injuries, especially when the time comes they start playing around with multiple kids.

How to Keep Baby Hands Warm At Night? Simple: Mittens!

Of course, you should keep mittens on cold nights too. This is to make sure your baby can stay warm enough during winter.

Besides, do you know that a baby has sharp fingernails? So apart from helping your baby sleep peacefully, mittens can also PREVENT skin scratches.

Apparently, a lot of critics say that mittens can hinder the motor skill development of a baby.

So, just KEEP the mittens at night in the baby’s crib and let them live the day WITHOUT them.

4. Prepare Your Bedding PROPERLY if You Don’t Want to Suffocate Your Baby!

This may already be the LAST step, but this is still CRUCIAL.

Read and understand the guides below CAREFULLY if you want to ensure that all your babies stay WARM and SAFE during the cold weather.

Firm & Organic Crib Mattress

“Why the firm mattress? I thought the softer, the better? They’re warmer, right?”

Well, technically, you’re right at the part where a soft crib sheet is warmer. HOWEVER! This will increase the risk of suffocation.

Remember the accident that we talked about earlier? That applies here as well.

Your baby will DROWN due to the strong softness of the crib sheet once he’s faced down to the crib. And if somehow he still managed to breathe, there’s no oxygen in there — they will INHALE their own breath!

To add to that, an ORGANIC crib mattress is also ESSENTIAL.

What Firm Bedding Can I Get for My Baby’s Crib?

We recommend Naturepedic’s Breathable crib mattresses! They’re sturdy yet soft, AND they’re made of safe and organic materials!

It’s NOT too soft that your baby will drown! It’s just for ensuring your little one is warm enough. It DOESN’T have toxic chemicals, too, making it safe to use!

Okay, Got It. But How Do They Retain Heat?

A sturdy crib mattress actually doesn’t retain heat that much.

This is why you’ll need to get the following items below to provide better hot air for your baby’s room. We just needed to mention this because IT IS SERIOUSLY IMPORTANT.

Space Heater

A space heater is actually not THAT necessary because this poses a lot of fire risks.

However, if you really have to get rid of that cold air lingering in your baby’s room, you might need to get one to keep your baby warm at night.


MAKE SURE that the space heater you’re going to get has these properties and functions:

  • Safe-certified
  • Tip-over switch
  • Programmable thermostat
  • Timer
  • Overheat protection
Why All These?

These ensure SAFE infant sleep!

A tip-over switch is there to SENSE when the heater tilts at a certain angle. If it’s in an unnatural position, the switch is used to turn off the heater.

You can set a pre-set schedule with a programmable thermostat to MAINTAIN the right temperature throughout the day. 

Using a timer function EASES your worries because it goes off once it’s past the pre-set schedule.

And overheat protection automatically TURNS OFF your heater when it becomes TOO HOT.

You can find ALL these functions in ASTERION’s space heater.

Heating Pad & Hot Water Bottle

You can leave these two on the crib FOR A WHILE to keep your mattress warm at night without depending on risky items.

…Actually, this can be risky too if you leave it for TOO LONG.

SO! Just LEAVE them for about 30 minutes on the crib and remove them after.

Your baby will DEFINITELY have a peaceful sleep with a warm and comfortable temperature.

Any heating pad and hot water bottle will do. You don’t need to buy a luxury one.

Be MINDFUL of Sudden Infant Death Syndrome!

These may all seem to be a great way to provide enough heat, but please REMEMBER:

Overheating is one BIG risk factor of Sudden Infant Death Syndrome (SIDS). This is a sudden sleep death that happens to infants, so be EXTRA CAREFUL!

These are other more factors that cause SIDS:

  • Inappropriate sleeping positions
  • When babies sleep on soft cushions
  • Breathing exhaled carbon dioxide
  • And more

To avoid this unfortunate death, you’ll need to follow very specific guidelines:

  • Learn proper baby sleep training
  • Avoid placing soft material and loose objects on the baby’s sleep area (these can be a suffocation risk)
  • Remove layers that cause excess heat
  • Set your baby’s room temperature that’s comfortable to a lightly clothed adult
  • And just AVOID overheating as much as possible

Safe sleep is ESSENTIAL for all babies!

Conclusion, a.k.a Our Last Tip

Honestly, this isn’t that complicated. The final thing we just want to say to you is:

Make sure you FOLLOW EVERYTHING listed here.

These are ALL essentials in keeping the baby warm and safe at night. Even when it’s not for winter, these are still helpful.

If you follow all these, you’ll be able to see your baby sleep soundly in any weather condition!


November 3, 2022 – minor content edits

July 22, 2021 – reviewed and updated article links

About the author

Angelica Graham

A few years ago, Angelica found out about all the plastic and toxic ingredients that got into most children’s products. And this worried her to no end. Because of this, she began to research what the best ingredients and materials were for children and made it her mission to share this information with other mothers.