Imagine walking past a café in Norway on a cold winter morning and seeing a baby sleeping peacefully in a stroller outside.
For visitors, the sight can be startling. But for many Norwegian families, outdoor naps are a familiar part of childhood.
Babies are wrapped in warm layers, placed in insulated prams, and allowed to sleep in the fresh air, sometimes even when temperatures fall below freezing.
Why do parents do it? And is sleeping in the cold actually good for babies?
A Winter Tradition That Surprises Visitors
Outdoor daytime naps have been part of family life in Norway and other Nordic countries for generations.
Some parents place strollers on balconies or outside homes. Certain childcare centers also have designated outdoor sleeping areas.
The custom is connected to friluftsliv, a Norwegian idea that emphasizes spending time outdoors and maintaining a connection with nature.
A 2021 study of Norwegian infant sleep practices found that mothers valued fresh air, independence and time in nature when discussing outdoor naps.
That doesn't mean every Norwegian family follows the same routine.
Why Parents Believe Fresh Air Helps Babies Sleep
Some parents say their children sleep longer or more peacefully outdoors.
A small body of research has examined outdoor sleep, including studies comparing infant naps in different temperatures.
But the evidence remains limited. Longer naps in particular settings do not prove that outdoor sleeping is healthier for every baby.
There is also no established scientific evidence that sleeping in cold air strengthens an infant's immune system.
The tradition is primarily a cultural practice, not a medically necessary treatment.
How Babies Are Kept Warm
Parents who follow the practice commonly use wool layers, hats, insulated sleeping bags and weather-protected strollers.
The goal is to keep the baby comfortably warm without overheating.
Norway's public health service advises parents to check their child's temperature and the temperature inside the stroller, and to supervise sleeping infants.
It also warns against covering the stroller opening with blankets, which can interfere with ventilation.
Wind is especially important because it can make conditions much colder than the thermometer suggests.
Can Outdoor Naps Be Dangerous?
Yes, if conditions are unsuitable or supervision is inadequate.
Infants are more vulnerable than adults to hypothermia and frostbite. They can also overheat if wrapped too heavily.
Norwegian health guidance calls for particular caution around temperatures of minus 10 to minus 15 degrees Celsius, especially with wind.
Some local Norwegian health authorities recommend keeping children under three indoors when the effective temperature reaches minus 10 degrees Celsius.
These figures should not be treated as universal safe thresholds. A child's age, health, clothing, exposure and weather conditions all matter.
Safe sleep positioning and an appropriate sleep environment remain essential wherever a baby naps.
What Research Actually Shows
A Finnish study published in 2010 examined how well infant clothing protected babies during outdoor winter naps.
Researchers found that matching clothing insulation to the weather was difficult. In colder conditions, some infants did not have sufficient thermal protection.
A separate 2021 Norwegian study explored parents' beliefs and found that outdoor naps were closely tied to cultural values.
Neither study established that cold-weather sleeping improves immunity or guarantees better health.
A Different Way of Thinking About Winter
For many Norwegian families, winter is not a reason to abandon outdoor routines.
Parents adapt their clothing, equipment and activities to the weather.
That approach helps explain why a stroller outside a café may seem ordinary in Norway but surprising elsewhere.
Yet the important part of the tradition is not exposing babies to cold for its own sake.
It is the combination of cultural habits, suitable conditions and attentive caregiving.
What looks unusual to a visitor can be an everyday routine for a Norwegian family. But the science offers an important reminder: fresh air may be valued, while keeping babies safe must always come first.
Safety note: Outdoor infant sleeping is not suitable in every climate or for every child. Parents should follow local pediatric and safe-sleep guidance rather than copy temperature practices from another country.
Sources: Helsenorge — Safety for newborns and young children; 2021 Norwegian infant sleep study; 2010 winter clothing study; The Local Norway — Outdoor napping tradition.