Your first winter with a baby goes smoothly with a few simple rules. Get outside every day, except in severe cold before 3 months. Keep viruses at bay with good hygiene habits and bronchiolitis prevention. Heat your home to around 19 °C and air it every day. And make the most of daylight, which is in short supply at this time of year.
None of this is complicated, but it all arrives at once: tiredness from broken nights, the first colds, the days drawing in. This article brings together what the Assurance Maladie (France’s national health insurance), Santé publique France (the French public health agency), Santé.fr (the official French health portal) and Naître et grandir (a Quebec parenting website) say, then suggests a way of getting through the season without shutting yourself away.
First winter with a baby: what really changes
Four things change compared with the rest of the year. Respiratory viruses circulate far more, and a young baby is more vulnerable to them than an adult. The cold means dressing and covering up differently. The home is heated and closed up, which changes the air we breathe. And finally, light is scarce: in Paris, the sun sets before 5.30 pm from mid-November to the end of January.
Babies born in autumn discover all this without ever having known anything else. Those born in spring go from the summer pushchair to their first coat. Either way, the guidance below applies.
Can you go out every day with a baby in winter?
Yes, and it’s actually recommended. Naître et grandir says it’s good to get outside every day, from the very first weeks. Start with 15 to 20 minutes when it isn’t too cold, then build up to around an hour. The Assurance Maladie only asks you to avoid going out with a baby under 3 months old when temperatures are very low.
What temperature is too cold?
No French guidance sets a specific threshold. The Canadian Paediatric Society, quoted by Naître et grandir, cuts down time outdoors from −15 °C and advises against it altogether at −27 °C. These temperatures are rarely reached in mainland France. In practice, in very cold weather or an icy wind, keep the outing short, and postpone it if your baby is unwell.
Pushchair or sling in severe cold?
Santé.fr recommends choosing the pram or pushchair during cold snaps. A baby carrier can squeeze the legs and increase the risk of frostbite in the feet. For the rest of the winter, carrying your baby close to you, under your coat, keeps them nice and warm, as long as their face stays clear. Our guidance on first outings is in our article on when you can go out with a newborn.
Dressing in two lines
One more layer than an adult, head, hands and feet covered, and a check at the back of the neck rather than the hands. The details, layer by layer, are in our guide to dressing your baby in cold weather.
Winter viruses: protecting a young baby without staying shut in
Santé publique France published its recommendations for the respiratory infection season on 8 October 2026. For young babies, they come down to five habits.
- Wash your hands regularly, and always before looking after your baby.
- Air the rooms.
- Wear a mask when you have a fever, a cough or a runny nose.
- Limit your baby’s contact with people who are ill.
- Avoid crowded, enclosed places with a very young baby.
These habits don’t mean isolating yourself. They mean making choices. A walk in the park rather than the shopping centre on a Saturday in December. Visits from healthy relatives rather than big get-togethers when your baby is just a few weeks old.
Bronchiolitis: prevention to decide on early
Respiratory syncytial virus (RSV) is the leading cause of bronchiolitis in babies. The 2026-2027 prevention campaign began on 14 September in mainland France. There are two options: vaccinating the mother during pregnancy, between 32 and 36 weeks, or a monoclonal antibody given to the baby from birth. Santé publique France asks for babies born before the season to receive it as soon as possible. The dates and the expected timeline of the epidemic are in our article on bronchiolitis 2026-2027.
When it’s the parent who is ill
This is the most common situation in winter, and the hardest to handle: you can’t keep away from your baby. A mask, handwashing and fresh air remain the three things you can rely on. Our article on being an ill parent with a baby explains how to organise things, including while breastfeeding.
Heating, airing, humidifying: your home in the first winter
The Assurance Maladie recommends a temperature of around 19 °C at home, without overheating, and airing for a few minutes every day, even when it’s cold. For a baby’s room, the usual guideline is 18 to 20 °C. Ten minutes of airing a day refreshes the air without chilling the walls, and clears out some of the viruses and indoor pollutants.
Heaters need extra care once a child is crawling. The Assurance Maladie reminds us never to run a fuel-burning portable heater continuously, and to have appliances serviced. How to choose and where to place one are covered in our guide to portable heaters for a baby’s room.
One thing people forget: the floor. In winter, a baby spends hours playing on the floor, and tiles or uninsulated wooden flooring stay noticeably colder than the air in the room. A foldable Treelys play mat stops that direct contact and cushions falls as your baby starts to move around.
Daylight, vitamin D and routine
Short days weigh on the whole family’s routine. Going out in the middle of the day, when the light is strongest, helps set your baby’s sleep pattern and lifts parents’ spirits. It’s also the least cold time of day.
Winter light isn’t enough, however, to cover a baby’s vitamin D needs. In France, supplementation is routine from birth and continues throughout early childhood, winter and summer alike. We cover the recommended doses and the overdose risk flagged by Anses (the French food safety agency) in our article on vitamin D for babies.
The clocks going back at the end of October shifts the markers of the day. Little ones react to it more than adults do. Our article on the clock change for babies explains how to shift naps and bedtime gently.
Organising the first winter: a simple calendar
Here’s a thread to follow, to adapt to your baby’s date of birth and childcare arrangements.
- September-October. Decide on RSV prevention, during pregnancy or at birth. Get out the coat, snowsuit or footmuff in the right size. Check the heating and the thermometer in the baby’s room.
- November. Set up the routine of daily outings in the middle of the day. Remind visiting relatives of good hygiene habits. Adults in the household can get a flu jab.
- December. The festive season means more contact: limit kisses from people with colds, avoid enclosed crowds with a very young baby, keep up naps.
- January-February. The usual peak for respiratory viruses. Air your home every day, and see a doctor straight away if a baby under 3 months has breathing difficulties, refuses feeds or has a fever.
- March. Lengthen outings as the light returns, lighten clothing in stages, and take stock of clothing sizes for next winter.
Childcare arrangements make a big difference to the season. A baby at nursery catches more viruses, and earlier. Rules on keeping ill children at home vary between settings, so it’s best to ask about them when you enrol.
The most common first-winter mistakes
- Not going out at all for fear of the cold: then everyone misses out on light and fresh air.
- Overheating the bedroom: above 20 °C, sleep suffers and sleep-related risk increases.
- Leaving the snowsuit on in the car or somewhere heated indoors: your baby sweats, then gets chilled on the way out.
- Relying on cold hands: they always are. The back of the neck tells the truth.
- Letting a visitor with a cold kiss your baby: it’s the main way winter viruses are passed on.
Key takeaways
- Go out every day, 15-20 minutes then up to an hour, avoiding severe cold before 3 months and choosing the pushchair over a carrier when it’s freezing.
- Five hygiene habits protect a young baby from winter viruses; RSV prevention is decided during pregnancy or at birth.
- 19 °C at home, 18-20 °C in the baby’s room, ten minutes of airing a day, and never a fuel-burning portable heater running continuously.
- Midday light sets the rhythm; vitamin D is still needed all winter.
Sources
- Santé publique France, press release “Grippe, Covid-19, bronchiolite : comment se protéger des infections respiratoires hivernales”, 8 October 2026.
- Assurance Maladie (ameli.fr), “Bien se protéger du froid”, 14 November 2019.
- Santé.fr (RecoSanté), “Quels réflexes à prendre pour protéger son enfant du grand froid ?”, published 23 July 2025, updated 6 July 2026.
- Naître et grandir, “Sortir l'hiver avec un bébé”, scientific review by Chantal Lacombe, clinical nurse, updated December 2024.
