How Cold Is Too Cold for Dogs? A Temperature Guide by Size, Coat and Age

For most healthy dogs, cold becomes a concern once temperatures drop below about 45°F (7°C), risky for many dogs below freezing (32°F / 0°C), and dangerous for nearly all dogs below about 20°F (-7°C), especially with wind or wet fur. Small, short-coated, very young, senior and sick dogs reach their limit much sooner than a healthy husky. When it is that cold, keep outings short, watch for shivering and lifted paws, and bring your dog inside at the first sign of trouble.

These thresholds are a widely used rule of thumb, not an official standard. Your own dog’s comfort, health and coat matter more than any number, so ask your veterinarian if your dog has a medical condition that affects how it copes with cold.

Why some dogs feel the cold more

Fur does not make every dog cold-proof. The AVMA points out that dogs and cats can get frostbite and hypothermia just as people can, and that even cold-tolerant breeds should not be left outside for long periods in below-freezing weather. The main factors are:

• Size. Small dogs lose body heat faster because they have more skin surface relative to their body mass, and they are closer to cold ground and snow.
• Coat. Thick double coats (huskies, malamutes, Bernese mountain dogs, Newfoundlands) insulate well. Thin, single or short coats (greyhounds, whippets, Chihuahuas, boxers) offer little protection.
• Body fat and condition. Lean dogs have less insulation. Being overweight is not a healthy substitute, as it brings other problems.
• Age. Puppies and senior dogs regulate their body temperature less well.
• Health. According to the AVMA, conditions such as diabetes, heart disease, kidney disease and hormonal imbalances can make it harder for a pet to regulate body temperature.
• Acclimatization. A dog that lives mostly indoors in a warm house has not adapted to outdoor cold the way a working sled dog has.

Temperature chart: a practical guide

Use the “feels like” temperature (wind chill) rather than the thermometer reading, and move down a row if your dog is wet, very young, old, small or thin-coated.

Huskies vs small dogs

A healthy, acclimatized husky with a full winter coat may happily trot through a 15°F morning, while a Chihuahua or whippet can be shivering at 40°F. Neither extreme is “right” for every dog. Even huskies need shelter, unfrozen water and time indoors, and the AVMA specifically warns against leaving them outside for long in freezing weather.

How long can a dog walk in the cold?

There is no exact number of minutes, but a sensible approach is:

1. Check the feels-like temperature and the forecast for wind, sleet or freezing rain.
2. Match the walk to the row in the chart above. In the coldest rows, think in minutes, not miles.
3. Dress dogs that need it. A well-fitted coat helps small, thin-coated, young and senior dogs. Booties or paw balm can protect paws from ice and de-icing salt.
4. Keep moving. Standing still in the cold chills dogs faster than brisk walking.
5. Watch your dog, not the clock. Shivering, lifting paws, slowing down, whining or trying to turn home are signs to head back now.
6. Dry off afterward. Towel off wet fur, and wipe paws to remove snow, ice balls and salt or antifreeze residue.

On very cold days, make up for shorter walks with indoor play, sniffing games and food puzzles. Our guide on how much exercise a dog needs has ideas for different ages and energy levels.

Other winter hazards

• Ice and de-icers. Rock salt and ice-melt products can irritate paws and upset the stomach if licked off. Wipe paws after walks.
• Antifreeze. Ethylene glycol antifreeze is highly toxic even in small amounts. Clean up spills and store containers securely. If you think your dog licked any, call your vet or an emergency clinic immediately.
• Frozen ponds and lakes. Keep dogs leashed near ice. Do not go onto the ice yourself to rescue a dog; call emergency services.
• Cars. A parked car can become dangerously cold in winter, just as it overheats in summer. See our tips on keeping dogs safe in hot weather for the summer side of the same rule.
• Space heaters. Keep heaters and heat lamps away from dog beds and crates because of burn and fire risk.

Signs of hypothermia and frostbite

Hypothermia (low body temperature) can start with shivering, whining, anxiety, slowing down, weakness and looking for warm places to burrow. As it gets worse, a dog may stop shivering, become lethargic or confused, have stiff muscles and slow breathing, and eventually collapse.

Frostbite most often affects the ears, tail tip and paws, especially when a dog is wet. VCA Animal Hospitals lists pale, gray or bluish skin that feels cold or brittle, pain or swelling, and later redness, blisters or darkened skin as warning signs. Signs can take several days to show up.

What to do

1. Get your dog inside to a warm, dry place right away.
2. Call your vet or an emergency clinic and tell them what happened.
3. Warm gradually with dry blankets or towels warmed in the dryer. Do not use heating pads or hair dryers directly on the skin.
4. Do not rub or massage areas that might be frostbitten. VCA notes that rubbing can cause more damage.
5. Do not give human pain medicine. Drugs such as acetaminophen and aspirin can be toxic to dogs.

VCA’s guide to frostbite in dogs explains first aid in more detail, and the AVMA’s cold weather safety page covers pets in general. A stocked pet first aid kit is useful to have in winter.

See a vet right away if your dog

• Is weak, confused, very sleepy or collapses after being in the cold
• Was shivering hard and has now stopped but is not acting normally
• Has pale, gray, blue or black skin on the ears, tail or paws
• Has painful, swollen or blistered paws, ears or tail
• May have licked or drunk antifreeze
• Fell through ice or was in cold water

Bottom line

Below about 45°F many dogs start to feel the cold, below freezing walks should get shorter for most dogs, and below about 20°F nearly every dog should only be out briefly. Small, thin-coated, young, senior and sick dogs need extra protection. Watch your dog’s body language, dress dogs that need a coat, wipe paws after walks, and get help quickly if you see signs of hypothermia or frostbite. For older dogs, our senior dog care guide has more comfort tips.

FAQ

Can dogs sleep outside in winter?

Most pet dogs should sleep indoors in cold weather. If a dog must be outside for any length of time, it needs a dry, insulated, draft-free shelter off the ground, bedding that stays dry, and unfrozen water, and you should still bring it in when temperatures drop well below freezing.

Do dogs really need coats?

Not all of them. Small, short-coated, lean, young and senior dogs often benefit from a coat when it is cold. Thick double-coated breeds usually do not need one and can overheat if dressed when it is not cold enough.

Is it safe to walk a dog at 20°F?

For a healthy, thick-coated dog, a short brisk walk is usually fine. For small or thin-coated dogs, puppies and seniors, keep it to a quick bathroom break, use a coat, and watch for shivering or lifted paws.

Does wind chill matter for dogs?

Yes. Wind strips heat from the body much faster, and wet fur makes it worse. Use the feels-like temperature when deciding how long to stay out.