Finnish Winter: What Life Is Really Like When It's -20°C

There is a viral map currently doing the rounds, ranking the temperature at which Europeans decide it is officially warm. Spain reckons 22 degrees. Italy holds out for 25. Finland, in a triumph of national stoicism, gets there at 9.

That single number tells you almost everything you need to know about Finnish winter.

A country that considers 9 degrees a heatwave is a country that has, by the time spring arrives, lived through some genuinely punishing weather. From the southern coast in a polite minus 5, to Lapland flirting with minus 30, Finnish winter is not a brief inconvenience between Christmas and the daffodils. It is a several-month-long lifestyle, complete with rules, customs, philosophical positions and a frankly suspicious amount of joy. The secret to surviving it, and even quietly enjoying it, starts in a hot wooden room with steam rising off the rocks. More on that shortly.

Here is what Finnish winter is actually like, from the inside.

The polar night, when darkness becomes a way of life

In northern Finland, the sun does not rise at all for several weeks. This phenomenon has a name. The Finns call it kaamos, and it runs from late November through January in Lapland. The sky shifts between deep blue twilight and full darkness for the entire day, which is exactly as disorienting as it sounds the first time you experience it.

Further south in Helsinki, things are slightly less Mordor-like. Winter days shrink to roughly six hours of grey low light, the kind of visibility that makes the whole city look as though it is being filmed through a damp window. New arrivals find this difficult. Finns barely notice. The pace of life adjusts on its own. Homes fill up with candles, the radio gets quieter, and everyone leans into the indoor cosiness that the dark seems to demand. There is even a Finnish word, talvi-ilo, which roughly translates as the joy of winter. Against all odds, it is not ironic.

The other side of all that lost sunlight is the most extraordinary light show on the continent. The aurora borealis appears over Finnish Lapland between September and March, ideally on clear cold nights well away from city lights. To watch the sky ripple green and violet above a snow-covered forest is, by most accounts, the kind of thing that makes you re-examine your previous understanding of words like beautiful, weird and possible.

The cold, and what those numbers actually mean

Finnish winter temperatures range from a fairly relaxed minus 5 in the south to minus 30 or lower in Lapland. January and February are the coldest months, and the months when even the Finns occasionally admit, very quietly, that things are getting a bit much. Minus 15 in still air is manageable with the right layers. Add wind and wet snow and the calculation gets dramatic in a hurry.

Finns dress for the cold with the same pragmatic precision a fighter pilot dresses for a sortie. The system is non-negotiable: a base layer that wicks moisture, a mid layer for insulation, a windproof outer shell, boots that are properly waterproof rather than just sold as such, a hat that covers the ears and gloves that are treated as mandatory equipment rather than an accessory. The visitor who underestimates Finnish cold typically does it once, and never again.

Snow begins to fall in October in the north and December in the south. When conditions cooperate, the entire country is buried under a kind of white silence that softens sound and turns even familiar streets into something unrecognisable. Finns wait for this first proper snowfall the way other cultures wait for the first warm day of spring. The eagerness is genuine. So is the relief.

Ice swimming, the avanto tradition

Ice swimming, or avanto in Finnish, is one of the defining rituals of Finnish winter and probably the single most baffling activity to anyone who has not tried it. Holes are cut into frozen lakes, the sea, or a river, and Finns lower themselves into water that hovers just above zero degrees. They stay in for a minute or two, climb out, then warm up in a sauna nearby. Then, depending on the company, they go back in.

It sounds extreme. In practice, it is a deeply social ritual, performed in the same spot week after week with the same group of slightly mad friends. Regular ice swimmers will tell you, with the kind of evangelical glow normally reserved for converts to obscure religions, about the better sleep, the improved circulation and the wellbeing that is impossible to explain until you have stood on the ice in minus ten with your heart hammering and felt extraordinarily, almost embarrassingly, alive.

There are thousands of dedicated ice swimming spots across Finland, most of them paired with a sauna. The combination of extreme cold followed by intense heat is the entire point. Discomfort chosen on purpose, as a Finn might quietly note, is a different thing entirely from discomfort imposed on you. The whole ritual has its own counting song that any Finnish child can recite, the one that begins with one, two, three, and finishes in the only place a sensible Finn would ever finish.

Sisu, worn and lived

All of this, the cold, the swimming, the long winter, the cheerful refusal to make a fuss, has a Finnish name. The word is sisu, and it is the closest the language gets to a single term for stubborn, stoic, slightly amused endurance. Sisu is the reason Finland keeps doing the harder version of every task. It is also why a country that invented modern cross-country skiing can still cross-country ski faster than the EU's stated maximum heart rate.

Sisu is not just a concept. It is a quiet national identity, and one that gets worn as much as it gets lived.

Winter sport, on skis and on ice

Finland has over 75 ski resorts, ranging from the long, properly mountainous runs of Ylläs and Levi up in Lapland to small family hills in the south where the bunny slope is, frankly, the main slope. Cross-country skiing, however, is the more central national activity. There are thousands of kilometres of groomed tracks across the country, and Finns of every age use them regularly from December through March. To go cross-country skiing with a Finn for the first time is to discover, swiftly, that you are unfit in ways you did not previously realise were possible.

Ice skating happens on natural lakes wherever the ice has been declared safe, which in most of the country means by mid-January in a normal year. Cities maintain outdoor rinks. Helsinki's market square, Kauppatori, becomes one during the coldest months, overlooking the frozen harbour, which is exactly as Christmas-card romantic as it sounds.

Snowshoeing, reindeer safaris in Lapland, ice fishing, sledding and winter hiking in national parks like Riisitunturi or Urho Kekkonen all draw visitors who have decided that the correct response to extreme cold is simply to go out into more of it. The Finnish winter calendar, in short, is not a waiting period. It is a sporting fixture list.

Christmas in Finland, the home of Father Christmas himself

Finland is, officially, the home of Santa Claus. His residence is in Rovaniemi in Lapland, and thousands of families from across Europe travel there every December to meet the man himself. The whole setup is genuinely extraordinary. Reindeer farms, elf workshops, log cabins, candlelit forest paths and the very real possibility of spending Christmas Eve under a metre of snow in complete silence. Try organising that in greater London.

Finnish Christmas traditions include the obligatory Christmas Eve sauna, eating rice porridge in slightly larger quantities than is sensible, visiting family graves with candles in the snow (which sounds bleak, looks beautiful and is in fact moving) and a Christmas Day meal that typically features gravlax, ham and an alarming number of root vegetable casseroles. The pace is deliberately slow. The point is to be inside, together, while the dark presses against the windows.

Christmas markets run through Helsinki's Senate Square and most other Finnish cities through December. Tuomaan markkinat, in front of Helsinki Cathedral, is one of the oldest in Scandinavia, with wooden stalls, mulled wine and crafts laid out under the snow.

Kotoilu, the Finnish art of being indoors well

Most of Finnish winter is, frankly, spent indoors. Finns have therefore elevated the indoor experience to something close to an art form. Thick candles, heavy blankets, long meals, strong coffee and the kind of unhurried conversation that only happens when there is nowhere particular to be and the world outside is, for all practical purposes, in the freezer.

There is a Finnish word, kotoilu, which roughly translates as the pleasure of staying home and making it feel good. It is a cousin of the Scandinavian concept of hygge, but with less marketing budget. Kotoilu is quieter, more self-sufficient, slightly more bookish. You are not performing cosiness for an Instagram audience. You are simply at home, in winter, and that is enough.

Books, crafts, slow weekend cooking, board games, films and very long sessions in the home sauna all become central winter activities. The Finns do not rush this season. They settle into it the way a cat settles onto a sofa it has decided is now a permanent part of its life.

Wildlife in the Finnish winter forest

Finnish forests in winter hold a surprising amount of life if you know where to look. Brown bears are, sensibly, in hibernation. Wolves, lynx and wolverines remain active and elusive. Reindeer move across Lapland in large herds, tended by Sami herders. Elk leave deep tracks in the snow along forest roads. Siberian jays and other boreal birds stay through the cold months, occasionally approaching humans in the wilderness with the unimpressed boldness of a creature that has wintered in Lapland and is unimpressed by your puffer jacket.

For those willing to go out into the forest at dusk, winter wildlife watching in Finland offers a stillness rare elsewhere in Europe, just the sound of skis on snow, a woodpecker somewhere in the birches and then nothing at all.

Frequently asked questions

How cold does it get in Finland in winter?

Southern Finland averages between minus 5 and minus 15 degrees Celsius in January and February. Northern Lapland regularly reaches minus 25 to minus 35 degrees Celsius in the coldest weeks. Wind chill can make the temperature feel significantly lower than the actual reading on the thermometer.

What is ice swimming and is it safe?

Ice swimming involves entering water kept just above freezing through a hole cut in lake or sea ice. It is generally safe for healthy adults who take normal precautions, such as never swimming alone and always having a warm sauna or dry clothes immediately available. Anyone with heart conditions or high blood pressure should consult a doctor first.

When is the best time to see the northern lights in Finland?

The aurora borealis is most visible in Finnish Lapland between late September and mid-March. Peak months are typically December through February because of the long nights. Clear skies away from light pollution are essential. There are no guarantees, but spending several nights in Lapland in winter gives a reasonable chance of a sighting.

What should I pack for a winter trip to Finland?

Thermal base layers, a fleece or wool mid layer, a windproof and waterproof outer jacket, insulated waterproof boots, a warm hat that covers the ears, gloves and a neck gaiter or balaclava. Merino wool socks are worth the investment. Finnish outdoor brands like Halti and Icepeak make gear specifically calibrated for these conditions if you need to buy something on arrival.

Is Finland a good destination for winter travel even without skiing?

Absolutely. Ice swimming, northern lights tours, reindeer safaris, snowshoeing, Christmas markets, wildlife watching and simply experiencing daily Finnish winter life all make for a compelling trip without setting foot on a ski slope. Helsinki itself is a rewarding winter city with excellent food, design culture and easy access to nature.

Finnish winter is long and it is uncompromising. But spend a week inside it, properly inside it, with the layers and the sauna and the dark and the light and the strange social warmth that emerges when a country has decided collectively that this is fine, and you start to understand why Finns do not just survive this season. They are quietly, almost slyly, proud of it.

If 9 degrees feels warm by April, you have officially become one of them.

If you want a longer guide to the country that produced all of this, the original 101 Very Finnish Problems book is the way in.

Browse the Sisu collection for designs that carry the same spirit year round.