What to wear for running at every temperature

The good news is that once you’ve grasped a few simple principles, you hardly have to think about it anymore. This guide provides the golden rule of running attire, the layering technique, fabric selection, and—most importantly—a practical temperature-by-temperature chart, ranging from a mild +15 to a biting -25. You’ll know exactly what to wear on your upper body, lower body, and extremities, as well as which accessories to add. All of this is tailored to our local conditions: wind, snow, ice, and extreme cold.

The golden rule: dress as if it were 10 degrees warmer

If you were to take away just one thing from this article, it would be this: never dress for the temperature it is when you step outside. Dress for the temperature your body will reach after ten minutes of running. When you run, your muscles generate a tremendous amount of heat. It’s generally recommended that you dress as if it were 10 degrees warmer than what the thermometer reads.

The foolproof test: when you step outside and take your first few steps, you should feel slightly cold—almost as if you’re reluctant to be out there. If you’re perfectly comfortable from the very first minute, you’re wearing too much and you’ll end up sweating profusely. That slight initial chill will fade in less than ten minutes. It’s the price you pay to stay dry for the rest of your run.

Dress for the end of the run, not the beginning

This principle follows directly from the previous one. The start of a run is always the coldest part: your body hasn’t warmed up yet, and your muscles are stiff. It’s very tempting to dress for that moment. That’s a mistake. Instead, picture kilometre five, when your heart is pounding, sweat is beading on your skin, and you’re dreaming of unzipping your windbreaker. That’s the runner you should be dressing for. A helpful tip: if your route starts facing the wind and ends with the wind at your back, expect the return trip to be significantly warmer.

The layering technique: the onion peel

The secret to managing the cold isn’t a single thick layer—it’s several thin layers worn one on top of the other. It’s the famous “onion peel” method. The air trapped between the layers acts as insulation, and—most importantly—you can adjust as needed: unzip a jacket, remove a layer and tie it around your waist, or pull up a neck warmer. A single down jacket leaves you no room to maneuver—it’s all or nothing.

The classic system has three distinct roles:

• The base layer: worn next to the skin, its job is to wick sweat away from the body. This is the most important layer. Never wear cotton here.
• The mid layer: it insulates by trapping heat. A thin microfleece, a lightweight hoodie, or a thicker merino sweater will do the trick. You add it when it’s cold and take it off when it’s mild.
• The outer layer: It protects against wind and precipitation. A breathable windbreaker or a waterproof-breathable jacket. It’s unnecessary in mild, dry weather, but becomes essential as soon as it gets windy or starts snowing.

In mild weather, a single layer is enough. Around -15, all three are often necessary. The trick is to adjust according to the day.

Materials: avoid cotton

The simplest rule—and the one most often broken by beginners: never wear cotton for running in winter, or even in the fall. Cotton absorbs sweat, traps it against your skin, and causes you to cool down dangerously as soon as you slow down. A cotton T-shirt soaked through at -10 is a recipe for hypothermia. Runners say that cotton is a death sentence in cold weather, and that’s hardly an exaggeration.

Two main categories of materials stand out:

• Technical synthetic fibres (polyester, polypropylene): lightweight, quick-drying, and excellent at wicking away moisture. Affordable and durable.
• Merino wool: more expensive, but it insulates even when wet, is naturally odour-resistant, and regulates temperature remarkably well. It feels wonderful against the skin in extreme cold.

You’ll find these technical garments in most specialty running stores in Québec, where the staff are well-versed in our local conditions.

Wind: the invisible enemy

The thermometer tells only half the story. Wind chill—the effect of wind that accelerates your body’s heat loss—can turn a bearable -12 into a biting -22. Always check the wind chill before heading out, not just the actual temperature. In high winds, a windbreaker becomes a must, even if the temperature seems mild.

A runner’s tip: Start your run facing the wind, when you’re fresh and dry, and finish with the wind at your back. There’s nothing worse than facing a freezing gust head-on when you’re drenched in sweat at the end of your run. Be sure to protect your face and lower abdomen, the areas where the wind does the most damage.

Rain and snow

In the cold autumn rain, the strategy is to accept getting a little wet on the outside while staying warm thanks to layers that insulate even when wet (merino wool shines here). A waterproof, breathable jacket and a visor cap to keep the rain out of your eyes round out the outfit.

Snow, paradoxically, is easier to handle than rain: it’s dry and can be shaken off. A water-repellent outer layer is often enough. However, snow on the ground changes the game for your feet. Merino socks that retain heat even when wet are invaluable, and in heavy snowfall, shoes with a waterproof membrane keep your feet dry. For everything related to traction and slippery surfaces, our guide to running in winter in Québec goes into more detail.

The chart: what to wear from +15 to -25 degrees

Here’s a reference guide broken down by temperature range. Remember that it already takes the 10-degree rule into account: these recommendations are for runners on the move, not for someone standing still. Adjust according to your personal tolerance for the cold, as it varies greatly from person to person.

Wind chill	Upper Body	Lower body	Extremities	Accessories
+15 and above	Technical T-shirt or tank top	Shorts	Nothing in particular	Cap, sunglasses, sunscreen
+10 to +15	Short-sleeved technical T-shirt	Shorts or cycling shorts	Nothing, or thin gloves at the start	Cap
+5 to +10	Lightweight technical long-sleeved top	Short tights or lightweight pants	Lightweight gloves	Ear warmers if needed
0 to +5	Long-sleeved top + lightweight windbreaker	Running tights	Gloves, technical socks	Lightweight toque or headband
-5 to 0	Technical base layer + thin windbreaker	Warm tights	Merino gloves and socks	Toque couvrant les oreilles, neck warmer
-10 to -5	Base layer + mid-layer + breathable windbreaker	Warm tights, sometimes lined	Mittens, thick merino socks	Toque, neck warmer adjustable
-15 to -10	Three layers: base layer, microfleece, windbreaker	Lined tights or base layer + tights	Warm mittens, double socks if needed	Toque chaude, neck warmer covering the nose, windbreaker over the lower abdomen
-25 to -15	Three thick layers, full-body windbreaker	Full double layer on the legs	Double mittens, undergloves, two pairs of socks	Balaclava or hood, goggles, lip balm on the cheekbones
-25 and below	Protect exposed skin as much as possible. Short run, close to home. If the wind chill is below -30, consider using a treadmill or staying indoors.

Protect your head, hands, neck, and face in extreme cold

When the body gets cold, it sacrifices its extremities to protect vital organs. As a result, fingers, toes, ears, and the nose are always the first to suffer. That’s where you need to focus your efforts in extreme cold.

• Hands: Mittens are far superior to gloves because the fingers keep each other warm. In extreme cold, layer thin undergloves under windproof mittens.
• Head: A breathable toque that covers your ears well. You lose a lot of heat through your head, but be careful not to overheat—a toque that’s too thick will make your scalp sweat.
• Neck and face: A versatile neck warmer is the most versatile accessory in your winter wardrobe. Pulled up over your nose and mouth, it protects your skin and warms the air you breathe in, which helps protect your airways in dry, freezing weather.
• Exposed face: When temperatures drop below -20, apply a rich balm to your cheekbones and nose—the areas most vulnerable to frostbite. Watch for the appearance of whitish, waxy patches: that’s your cue to head indoors.

The number one pitfall: dressing too warmly

People often think that in winter, the danger comes from not dressing warmly enough. In reality, for runners, the most common pitfall is the opposite: dressing too warmly. Here’s why it’s dangerous—and not just uncomfortable.

When you’re overdressed, you sweat profusely. That sweat soaks through your layers. As long as you’re running hard, you’ll be fine—your body produces enough heat. But as soon as you slow down, stop at a red light, walk the last stretch, or get injured, that moisture cools you down at an alarming rate. A soaked, stationary runner at -15 can slip into hypothermia in just a few minutes. Staying dry in winter is a matter of survival. It’s better to be slightly cold and stay dry than to be nice and warm and end up soaked. Trust the “start” test: if you’re not even a little cold when you head out, go back and take off a layer.

Conclusion

Dressing properly for running in Québec isn’t rocket science—it’s a habit you’ll pick up after just a few runs. Remember the basics: dress as if it were 10 degrees warmer, layer thin garments rather than one thick one, avoid cotton, protect your extremities in extreme cold, and above all, don’t bundle up so much that you start sweating. Keep this guide handy for the first few weeks, and then your body will develop its own internal thermostat. Once you’ve mastered this skill, no temperature will ever stop you from lacing up your running shoes. And to give you a goal to aim for, no matter the season, check out the race calendar in Québec: there’s always a race number waiting for you, from a summer 5K to a winter challenge.