Ski layering chart by temperature, resort and touring
Ski clothing is three layers with one job each: a base layer that moves moisture, a midlayer that holds warm air, and a shell that stops wind and snow. At 20 to 32 Fahrenheit a resort skier wants a midweight base, grid fleece and an insulated shell; a tourer at the same temperature wants a light base and a wind shell with insulation staying in the pack until they stop.
The printable version of the layering calculator. The two columns are the point: at the same air temperature a resort skier is adding insulation and a tourer is taking it off, and both are right, because one is sitting still for half the day and the other is working continuously.
What to wear, by temperature and activity
| Temperature | Resort, lift-served | Touring, climbing |
|---|---|---|
| Above freezing 33 to 50 F (1 to 10 C)
| Light base, no midlayer, and a shell you can vent. Expect wet snow and pack a second pair of gloves. | Skin in the base layer alone. A vest at most. Nearly everyone overdresses in this band. |
| 20s Fahrenheit 21 to 32 F (-6 to 0 C)
| Midweight base, grid fleece, insulated jacket or a shell over a light puffy. The classic bluebird setup. | Light base and a wind shell up. Insulation stays packed and goes on at every transition, not before. |
| Single digits to 20 6 to 20 F (-14 to -7 C)
| Heavyweight base, grid fleece, insulated shell, face covered, goggles that do not gap. This is where the cheap glove fails. | Midweight base, wind shell, and a genuinely warm belay parka that lives in the pack for transitions and skins-off stops. |
| Below zero Fahrenheit -30 to 5 F (-34 to -15 C)
| Two upper layers under an insulated shell, mittens rather than gloves, chemical or rechargeable warmers, no exposed skin. Watch each other for frostnip. | Serious cold. Vapour management dominates: any sweat you generate on the climb becomes ice on the descent. Overboots, a spare pair of gloves and a full-coverage hood. |
The touring column consistently sounds underdressed, and it is meant to. The discipline that separates comfortable tourers from cold ones is starting a climb slightly cold and putting the warm layer on at every transition rather than before it. Everything you sweat into on the way up becomes ice on the way down.
Wind chill grid
| Air temperature | 5 mph | 10 mph | 15 mph | 20 mph | 30 mph | 40 mph |
|---|---|---|---|---|---|---|
| 40 F | 36 F | 34 F | 32 F | 30 F | 28 F | 27 F |
| 30 F | 25 F | 21 F | 19 F | 17 F | 15 F | 13 F |
| 20 F | 13 F | 9 F | 6 F | 4 F | 1 F | -1 F |
| 10 F | 1 F | -4 F | -7 F | -9 F | -12 F | -15 F |
| 0 F | -11 F | -16 F | -19 F | -22 F | -26 F | -29 F |
| -10 F | -22 F | -28 F | -32 F | -35 F | -39 F | -43 F |
| -20 F | -34 F | -41 F | -45 F | -48 F | -53 F | -57 F |
Uses the current National Weather Service formula, valid at or below 50 Fahrenheit and at or above 3 mph. Read across any row and it is obvious why a windproof shell and a hood that seals around a helmet matter more in an exposed spot than another insulating layer: twenty degrees with a forty mile an hour wind is the same exposure as roughly minus one degree in still air.
Frostbite exposure times
| Wind chill | Risk | Exposed skin |
|---|---|---|
| Above minus 18 F | Low | Frostbite unlikely on covered skin. Normal face protection is enough. |
| minus 18 to minus 32 F | Moderate | Frostbite possible in about 30 minutes. Cover the face and check each other on the lift. |
| minus 32 to minus 48 F | High | Frostbite possible in about 10 minutes. No bare skin, and watch for white patches on cheeks and nose. |
| Below minus 48 F | Extreme | Frostbite possible in about 5 minutes. Cover everything, and consider whether the day is worth it. |
These are the published NWS thresholds presented as general information rather than a personal risk assessment. The practical takeaway is that in serious cold the marginal layer that matters is on your face, not your torso, and that the person who cannot feel their cheeks is the person least likely to notice.
Base layer weight in grams per square metre
| Weight | Label | Use | Note |
|---|---|---|---|
| 120 to 150 gsm | Lightweight | Ski touring, spring resort days, anyone who runs hot | Moves moisture fastest and insulates least. The right weight for continuous output. |
| 180 to 200 gsm | Midweight | The all-round resort choice | Enough insulation for a chairlift, still workable when you are skiing hard. If you own one, own this. |
| 230 to 260 gsm | Heavyweight | Genuinely cold resort days | A warm layer for sitting still. Too warm for anything where you generate heat continuously. |
Pair a midweight top with a lightweight bottom for resort skiing. Legs generate heat inside insulated pants and a heavy bottom layer is the fastest way to overheat, which is why the beginner resort build on this site specifies a 190 gsm top and a 165 gsm bottom rather than a matching set.
The three layers, and what each one is for
Base layer. Sits against the skin and moves moisture away from it. Merino keeps insulating when damp and resists odour over multiple days; synthetics dry faster, cost less and last longer; blends split the difference. Cotton is the only genuinely wrong answer anywhere in the system.
Midlayer. Holds warm air. Grid fleece is the most useful single piece in snow sports, because the grid traps air in the squares and moves moisture along the channels, so it keeps working while you are working. A puffy is for when you stop, and for a wet activity it should be synthetic rather than down.
Shell. Keeps wind and snow out while letting moisture escape. Pit zips vent more moisture in a minute than any membrane does in an hour, and taped seams are the difference between a jacket that keeps snow out and one that leaks at every stitch line after an hour in wet snow.
Adding warmth to the wrong layer is how people end up simultaneously sweating and cold. Cold means change the midlayer. Wet means the shell or the venting. Clammy means the base layer is wrong or there is cotton in the system.
The spring problem
Above freezing changes the requirement rather than reducing it. Wet snow soaks anything that is merely water-resistant, which is most inexpensive ski gloves and a lot of softshell. A genuinely waterproof shell and a second pair of gloves are worth more on a 40 degree spring day than any amount of insulation, and a soaked glove at two in the afternoon ruins an otherwise perfect day.
For tourers, spring adds the vapour problem in reverse: you overheat on the climb in strong sun and then descend through refrozen shade. Sun protection becomes real equipment at that point, since reflected UV off snow at altitude is severe, and a lightweight sun hoody plus lip protection is cheaper than the alternative.
Related
Run conditions through the layering calculator, and read the layering system explained for the reasoning in depth. The roundups for base layers, midlayers, shells and socks and gloves cover the pieces at each tier.
Frequently asked questions
What should I wear skiing at 20 degrees Fahrenheit?
At a resort: a midweight base layer, a grid fleece, and either an insulated jacket or a shell over a light synthetic puffy, with a face covering and goggles that do not gap. Ski touring at the same temperature: a light base layer and a wind shell for the climb, with the insulation staying in the pack and going on at every transition.
Why does the resort answer differ from the touring answer?
Because a resort day is a heat cycle and a touring day is not. Riding a chairlift you are sitting still in the wind for half of every cycle, so you need insulation worn constantly. Climbing on skins you generate heat continuously, so insulation worn while moving becomes sweat, and sweat becomes ice on the descent.
What base layer weight should I buy?
Around 180 to 200 grams per square metre for the all-round resort choice, 120 to 150 for touring and warm days and for legs inside insulated pants, and 230 to 260 for genuinely cold days spent sitting on a lift. Weight in gsm is the number to shop on and most reputable brands publish it.
At what wind chill is frostbite a risk?
The published National Weather Service thresholds are roughly 30 minutes to frostbite on exposed skin at about minus 18 Fahrenheit wind chill, 10 minutes at about minus 32, and 5 minutes at about minus 48. Those are exposure times for bare skin, which is why face coverage matters more than another body layer in serious cold.
Is cotton really that bad for skiing?
Yes, and it is the one absolute rule in ski clothing. Cotton absorbs sweat, holds it against your skin and stops insulating entirely when wet, which in cold weather is a hypothermia risk. A cotton t-shirt under a ski jacket is the most common clothing mistake in the sport and it is entirely avoidable.
How do I stop getting cold hands and feet?
Not with more insulation, in most cases. Cold feet in ski boots come from compressed circulation, so one thin snug sock, a properly fitted shell, a supportive footbed, dry liners and loosening the buckles on the lift are the real fixes. For hands, mittens are meaningfully warmer than gloves at the same insulation, and carrying a second dry pair matters more than buying a warmer first pair.
How we choose: we compare published manufacturer specifications, published certification standards and verified owner reviews across retailers. We do not test equipment in person, and every figure quoted here is the manufacturer's published number unless we say otherwise. This is researched buying guidance and not professional instruction: binding release values are set by a certified technician on a calibrated jig, and avalanche terrain requires formal training and a current regional forecast that no article can replace.
