What Temperature Should Baby’s Room Be? | Safe Sleep Guide

The recommended baby room temperature for safe sleep is generally 68–72°F (20–22°C), a range that may help reduce the risk of overheating.

Most new parents spend the first few nights checking if their baby is too cold. The instinct to bundle up is natural. But the bigger risk for sleeping infants is actually the opposite — overheating is a known factor in sudden infant death syndrome (SIDS).

So what temperature should a baby’s room be? Pediatric organizations largely agree on a range that feels comfortable for a lightly clothed adult. This article covers the evidence-based number, why it matters, and practical ways to keep your baby’s nursery comfortably temperate through the night.

The Safe Sleep Temperature Range

The American Academy of Pediatrics (AAP) recommends keeping the room where your baby sleeps at a comfortable temperature for an adult in light clothing. The AAP also advises dressing your baby in no more than one extra layer than you would wear yourself.

That comfortable range typically falls between 68 and 72 degrees Fahrenheit (20 to 22 degrees Celsius). It is not a precise target but a zone that balances warmth with the need to avoid overheating. The CDC echoes this guidance, noting that overheating during sleep can increase SIDS risk.

If the room feels comfortable for you in a t-shirt, it is likely appropriate for your baby. A simple digital thermometer on the nursery wall can take the guesswork out of the question.

Why Overheating Raises Concern

Babies regulate their body temperature less efficiently than adults. They can overheat quickly, especially when wrapped too warmly or placed near a heat source. Overheating is one of the modifiable risk factors for SIDS, which is why temperature management is a core part of safe sleep guidelines.

Signs that your baby may be too warm include:

• Sweating or damp hair: Noticeable moisture on the back of the neck or scalp despite a moderate room temperature.
• Chest feels hot to the touch: The baby’s chest or back should feel comfortably warm, not hot.
• Flushed or reddened cheeks: Facial redness beyond mild pinkness can signal overheating.
• Restlessness or difficulty settling: A baby who is too warm may fuss or wake frequently.
• Rapid breathing: As the body tries to cool down, breathing may become faster than normal.

If you notice any of these signs, remove a layer of clothing or adjust the room temperature slightly downward. The goal is a baby who is warm but not sweating.

Dressing Your Baby for the Room Temperature

Instead of relying on blankets — which are not recommended in the crib due to suffocation risk — use a wearable blanket or a sleep sack. Choose a thickness appropriate for the season. In the 68–72°F range, a cotton footed sleeper or a lightweight sleep sack is usually sufficient.

A good rule of thumb: touch your baby’s chest or the back of the neck. If that skin feels cool, add a layer. If it feels warm or damp, remove a layer. Hands and feet slightly cool are normal because circulation to the extremities is still developing.

The CDC advises not to cover a baby’s head during sleep, since the head is a major heat-loss area. Sweating or a chest that feels hot are among the CDC overheating signs parents should watch for. Dressing in one more layer than you feel comfortable in is a helpful starting point.

These visual and touch-based signs are more reliable than guessing from background temperature alone. Pairing a thermometer with hands-on checks gives you a complete picture.

Tips for Maintaining the Right Temperature

Keeping your baby’s room within the 68–72°F range can take a little effort, especially during seasonal extremes. These simple strategies can help you stay consistent through the night.

1. Use a digital room thermometer: Place it near the crib, away from direct sunlight or vents, to get accurate readings.
2. Choose breathable bedding: A firm, flat mattress with a fitted sheet is all that is needed — skip padded mattress covers, which can trap heat.
3. Adjust dressing seasonally: In warmer months, a short-sleeved onesie combined with a lightweight sleep sack usually works. In cooler months, a long-footed sleeper under a thicker sleep sack may be sufficient.
4. Avoid space heaters in the nursery: They can quickly raise the room above the safe range and may pose a fire hazard. If a room is cold, improve insulation or close curtains.

These tips are easy to integrate into a bedtime routine and can prevent sudden temperature swings that disrupt sleep or cause overheating.

When the Room Feels Too Warm or Too Cold

Sometimes the nursery temperature drifts outside the ideal zone despite your best efforts. A guide from Johns Hopkins Medicine on infant safe sleep emphasizes keeping the baby’s room at a temperature that feels comfortable for the parent — and dressing the baby lightly to prevent overheating. You can refer to their infant safe sleep resources for more details.

If the room is warmer than 72°F, use a fan on low to circulate air (aimed away from the baby) or open a window slightly if safe and practical. If the room is cooler than 68°F, add a sleep sack rather than a blanket. Avoid heavy quilts or comforters.

It is also worth noting that UK guidelines from The Lullaby Trust suggest a slightly cooler range of 61–68°F (16–20°C). This reflects different housing insulation and climate norms, but both US and UK advice center on avoiding overheating through appropriate clothing and room temperature.

The Bottom Line

Maintaining a baby’s room temperature around 68–72°F (20–22°C) is a simple, research-backed step that may reduce the risk of overheating during sleep. Dress your baby in a wearable blanket or one extra layer, skip loose blankets and hats in the crib, and check the back of the neck for warmth or sweat.

Every baby is different — your pediatrician can help you adjust these guidelines for your child’s specific health needs, room conditions, and any medical concerns like fever or reflux.