Preparing for cold weather means protecting your body, your home, and your vehicle before temperatures drop. The stakes are real: exposed skin can develop frostbite in as little as 10 minutes when wind chill drops to around -20°F, and your core body temperature only needs to fall below 95°F for hypothermia to set in. The good news is that most cold-weather problems are preventable with straightforward preparation.
How Your Body Loses Heat
Your body burns extra calories just to stay warm. At mildly cool temperatures (around 60°F to 68°F), most people burn an extra 50 to 200 calories per day. In more extreme cold, that number can climb past 1,000 extra calories daily. This matters practically: if you’re spending extended time outdoors, you need to eat more than usual. High-calorie snacks like trail mix, nuts, and energy bars are easy to carry and give your body fuel to generate heat.
Cold air also dehydrates you faster than you might expect. You lose moisture every time you exhale (that visible breath on a cold morning is water leaving your body), and the dry winter air pulls moisture from your skin. The problem is that cold blunts your thirst, so you may not feel like drinking. Make a conscious effort to keep sipping water throughout the day, even if you don’t feel thirsty.
Dress in Three Layers
The layering system works because it traps warm air between fabrics while letting sweat escape. Getting this wrong, particularly by wearing cotton, is one of the most common cold-weather mistakes. Cotton absorbs moisture and holds it against your skin, which drops your body temperature fast.
Base Layer
This sits directly against your skin, and its only job is pulling sweat away from your body. Wool, polyester, and nylon all work well. Staying dry is the single most important factor in staying warm, so this layer matters more than most people realize.
Mid Layer
This is your insulation. Polyester fleece and down jackets are the two most common options, and each has trade-offs. Fleece comes in different weights (heavier means warmer), dries quickly, and still insulates when damp. It’s breathable enough that you’re unlikely to overheat during activity. Down jackets offer more warmth per ounce than any other insulating material and compress easily for packing. The catch: once down gets wet, it loses its insulating ability. If you’re likely to get wet, fleece is the safer bet.
Outer Shell
Your shell blocks wind and precipitation. Look for something that balances waterproofing with breathability. A fully waterproof shell keeps rain and snow out but can trap sweat inside, so if you’re active, a breathable option prevents that moisture buildup that makes you cold.
Know the Wind Chill Danger Zones
Air temperature alone doesn’t tell the full story. Wind dramatically accelerates heat loss from exposed skin, and the National Weather Service wind chill chart maps out exactly how dangerous specific combinations are. At -40°F with just a 5 mph breeze, the wind chill hits -58°F and frostbite can develop in 10 minutes or less. Bump that wind to 45 mph at -20°F and you reach the same wind chill, but frostbite can strike in under 5 minutes.
Early frostbite shows up as pain, numbness, or color changes in your fingertips, nose, ears, or toes. Skin may turn red, white, or blue, and blisters can form. In severe cases, tissue dies and may require surgical removal. When wind chill drops below -50°F, the safest choice is to stay indoors entirely.
Protect Vulnerable Family Members
Babies and older adults are at significantly higher risk in cold weather, and for different biological reasons.
Babies have a large body surface area relative to their weight, so they radiate heat quickly. They can’t shiver (which is your body’s main emergency heating mechanism), they have very little insulating body fat, and their temperature regulation systems are still developing. They simply cannot warm themselves the way adults can.
Older adults face a different set of challenges. Their baseline body temperature tends to drop with age, they produce less heat energy, and their blood vessels don’t constrict as efficiently to conserve warmth. They also shiver less, and their ability to sense temperature changes can decline. This means an older person may not even realize they’re getting dangerously cold. Check on elderly neighbors and relatives regularly during cold snaps.
Winterize Your Home
Frozen pipes are one of the most expensive cold-weather problems homeowners face. In southern states, pipes typically start freezing at around 20°F, while homes in northern climates may be better insulated against it. The most vulnerable pipes run through unheated spaces like crawl spaces, attics, and exterior walls, where they’re exposed to outside air rather than your home’s warmth. Insulating these pipes before winter arrives cuts heating costs and prevents the kind of burst that floods a basement.
During extreme cold, letting faucets drip slightly keeps water moving and reduces freezing risk. Open cabinet doors under sinks on exterior walls to let warm air reach the pipes.
Heating Safety
Space heaters cause a disproportionate share of winter house fires. The U.S. Consumer Product Safety Commission recommends keeping heaters away from furniture, draperies, and anything combustible, and placing them where they won’t be knocked over by foot traffic. Never use a gas oven or stove to heat your home, as this creates carbon monoxide buildup. Install carbon monoxide detectors on every level of your house and test them before the heating season starts.
Pack a Winter Car Kit
A breakdown or slide off the road in winter can turn life-threatening if you’re stuck waiting for help. The Wisconsin Department of Transportation recommends keeping these items in your vehicle:
- Warmth: blankets or sleeping bags, extra stocking caps, warm socks, and gloves
- Visibility and communication: flashlight with extra batteries, cell phone charger
- Fuel and water: drinking water and high-calorie, non-perishable food like trail mix and protein bars
- Recovery tools: booster cables, windshield scraper, sand or cat litter for traction
- Medical: first-aid kit
If you do get stranded, stay with your vehicle. It provides shelter and makes you far easier for rescuers to spot than a person walking along a road in a snowstorm.
Keep Pets Safe
No pet should be left outside for extended periods in below-freezing weather. Dogs and cats are vulnerable to frostbite and hypothermia just like humans. Watch for warning signs: whining, shivering, anxiety, slowing down, weakness, or burrowing into warm spots. Any of these signals mean your pet needs to come inside immediately.
Short-haired breeds, small dogs, puppies, and senior pets are especially vulnerable. If your dog needs a coat for walks, that’s not pampering, it’s practical. Wipe down paws after walks to remove salt and chemical deicers, which can irritate skin and are toxic if licked off. Make sure outdoor water bowls aren’t frozen, and provide a warm, dry shelter if any animals must spend time outside.