Nursery humidity: the ideal level and why it matters for your babe

By Stellar Baby Updated 7 July 2026 1 min read

Everyone talks about temperature. Humidity? Rarely gets a mention, yet it's the quiet other half of your babe's environment. Here's what's worth knowing.

What humidity even is

Humidity is just how much moisture is in the air. Too little and the air feels dry; too much and it feels damp. Both ends have downsides for comfort.

The commonly cited comfortable range

A commonly cited range is roughly 40 to 60 percent, a helpful target to gently aim for rather than a hard rule. That's the middle zone most guidance points to, but it's not a number to stress over.

Why it matters for your little babe

Very dry air can leave little noses and skin feeling it (hello eczema!), and can make congestion feel worse. Very damp air isn't ideal either, this encourages dust mite and mould production. Keeping things in the middle range is the comfortable spot.

Do you need a humidifier?

Not always. If your environment already sits in a comfortable range, you may not need one at all. They're most useful when the air is persistently very dry.

How to know your levels

You can't feel a percentage. Orbie reads humidity alongside temperature right where your babe sleeps, so you actually know where you're sitting rather than guessing.

Orbie tracks humidity alongside temperature. You can see how it works here.

This article is general information, not medical advice. If you're ever worried about your little babe, trust your gut and reach out to your GP, child health nurse, or Pregnancy, Birth and Baby on 1800 882 436.

Sources

  • Ionescu C et al. (2023). Relative Humidity and Its Impact on the Immune System and Infections. PMC. Read here
  • Mudarri D & Fisk W (2007). Public Health and Economic Impact of Dampness and Mould. Indoor Air. Read here
  • National Eczema Association. Dust Mites and Eczema. Read here

Humidity is the half of the nursery climate almost no one talks about.

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Common questions

What humidity should a baby's room be?

A commonly cited comfortable range is roughly 40 to 60 percent. Very dry and very damp air both have downsides, so the middle is the comfortable zone.

Is dry air bad for babies?

Very dry air can leave little noses and skin feeling irritated. It is not usually a cause for alarm, but keeping humidity in a comfortable range can help.

Do I need a humidifier in the nursery?

Not always. If your environment sits in a comfortable humidity range you may not need one. A humidifier can help when the air is persistently very dry.