9-minute read · Researched with Canadian veterinary, government and animal-welfare sources · Sources listed at the end
How cold is too cold for cats? Outdoors, Cats Protection says anything below about 7°C can start to be unsafe for long periods, and below 0°C most cats should reach warmth within 10 to 15 minutes. Indoors, a draught-free home with warm beds is fine; an unheated garage is not a safe place to leave a cat overnight.
November is when the question gets real across Canada. The first deep cold snaps arrive, thermostats drop at night, and outdoor and community cats start looking for warm engines and sheltered corners. Kittens, seniors, unwell cats and hairless cats feel it first. This guide breaks the numbers down by setting, in Celsius, and covers the signs that mean a cat needs warming up or a vet.
Key takeaways
- Cats Protection advises that anything below about 7°C can start to be unsafe for cats outdoors, especially for long periods.
- Washington State University's veterinary hospital advises that most cats should spend no more than 10 to 15 minutes in freezing temperatures before reaching a warmer space.
- Below 0°C, blood vessels near the skin narrow, which puts ear tips, tails and paws at risk of frostbite.
- Garages add their own dangers: antifreeze, warm engines and open dryers. Tap the hood before you drive and keep antifreeze sealed.
- Indoors, watch the cat rather than the thermostat: shivering, curling into a tight ball, lethargy and cold ears or paws mean they need more warmth.
How cold is too cold for cats? Temperatures by setting
No single number fits every cat. A dry, thick-coated adult who's moving around copes far better than a wet kitten or a 15-year-old with stiff joints. Use this table as a starting point, then adjust for your cat.
| Setting | Temperature | Risk for a healthy adult cat | What to do |
|---|---|---|---|
| Heated home | Normal indoor temperatures | Low | Offer warm, draught-free beds and perches off cold floors |
| Home at night with the thermostat turned down | Cooler than daytime | Low; higher for kittens, seniors and hairless cats | Add a covered bed; move beds away from draughty doors and windows |
| Unheated garage, porch or shed | Can drop close to the outdoor temperature | Moderate to high, plus antifreeze and vehicle hazards | Don't leave cats there overnight; if unavoidable, provide an insulated, raised shelter |
| Outdoors, cool | Below about 7°C | Rising, especially when wet or windy | Shorter outings, a dry sheltered spot and a way back inside |
| Outdoors, freezing | 0°C and below | High; frostbite risk to ears, tail and paws | About 10 to 15 minutes before access to warmth |
| Outdoors, severe wind chill | Wind chill of −28 or colder | Very high | Keep cats indoors; community cats need an insulated shelter |
How cold is too cold for cats outside?
For outdoor time, two numbers are worth remembering. Cats Protection's guidance on keeping cats warm and preventing hypothermia says anything below about 7°C can start to be unsafe for cats to stay outside, especially for long periods. Washington State University's veterinary hospital, in When is the cold too cold for your pet?, advises that most dogs and cats, certainly those with thinner coats, should be in freezing temperatures for no more than 10 to 15 minutes before they can get somewhere warmer.
Wind and wet fur make things worse. Environment and Climate Change Canada's wind chill guidance explains that wind doesn't lower the actual air temperature, but it does speed up how fast bodies lose heat. Its chart, written for people, rates exposed skin at high risk of frostbite within 10 to 30 minutes once the wind chill reaches −28 to −39. A cat's ear tips, nose and paw pads are exposed too, so on those days outdoor time should be close to zero.
Indoor cats who go out on a harness or into a catio can still enjoy short sessions on dry, sunny days. Community cats can't come in, which is why an insulated, straw-filled shelter matters so much; our guide to choosing an outdoor cat house for winter covers setup. Wipe paws after every outing, since salt and de-icers are hard on pads; see our winter paw care guide.
How cold is too cold for cats in a garage?
An unheated garage blocks the wind, but on a cold night it may be little warmer than outside, and it holds hazards a backyard doesn't.
Antifreeze
Cornell's cold weather tips for cats warn that antifreeze is extremely toxic to cats and that its taste attracts them, so keep it sealed and clean up spills and leaks promptly. Cats Protection adds that even a few licks can cause serious harm, such as kidney failure, and suggests choosing products without ethylene glycol.
Warm engines
Cats climb into engine compartments and wheel wells to warm up. Cornell recommends checking the wheel wells and honking the horn or banging on the hood before you start the car.
Dryers and other warm spots
Cornell's College of Veterinary Medicine, in its winter weather safety tips, also reminds owners to close the clothes dryer door, because cats are drawn to warmth.
If a cat has to stay in a garage briefly, give them an insulated shelter raised off the concrete with straw or a dry bed, unfrozen water and a litter box, and check on them often. For your own cat, the house is always the better choice.
Do cats get cold at night indoors?
They can, especially when the thermostat drops overnight or the bed sits near a draughty patio door. Cats Protection lists the signs of a cat who's too cold: shivering, curling tightly into a ball, being more tired than usual and cold ears, paws or tail. It recommends warm, comfortable, draught-free places to rest, plus heat pads or beds designed to hang over radiators.
- Move beds off tile and away from exterior doors and older windows.
- Offer a covered or cave-style bed your cat can burrow into.
- Give your cat a raised perch, such as a cat tree platform, so they can sleep above floor-level draughts.
- If you use a heated pad, choose one made for pets and leave room to move off it.
Which cats feel the cold first?
Cats Protection names kittens, unwell cats, elderly cats and hairless cats as the most vulnerable, and Cornell's College of Veterinary Medicine points to younger, older and short-haired cats. Each group needs a little more help:
- Kittens are small and lose heat quickly. Keep them indoors with a warm, enclosed bed.
- Senior cats often have stiff joints and may struggle to reach warm spots; our list of home changes for senior cats can help.
- Hairless and thin-coated cats, such as the Sphynx, have little natural insulation and need warm beds and draught-free rooms.
- Unwell or recovering cats may not move to warmer spots on their own, so check on them more often.
Sharing your home with a dog too? Our companion guide, how cold is too cold for dogs, covers walk times by wind chill.
Cat hypothermia and frostbite signs
Hypothermia
Cornell lists shivering, anxiety and moving slowly as signs a pet has been in the cold too long. Cats Protection describes more serious signs, including weakness or trouble walking, slow or shallow breathing and pale gums, and emergency signs such as collapse, unresponsiveness and dilated pupils. WSU, citing the American Kennel Club, describes mild hypothermia as a body temperature of about 32 to 37°C, moderate as about 28 to 32°C and severe as below about 28°C, and notes these ranges can apply to cats too.
If you suspect hypothermia, bring the cat inside, dry them and warm them gradually with blankets or your own body heat. Cats Protection advises against hot water or heating pads. Then call your vet.
Frostbite
VCA explains in Frostbite in Cats that when it drops below 0°C, blood vessels near the skin narrow, and ear tips, tails and paws are most at risk, especially when wet. Signs include pale, grey or bluish skin, coldness or brittleness, pain when touched, swelling or blisters and, later, dark dying tissue. VCA's first aid is to warm the area with warm, not hot, water (about 37 to 45°C), pat it dry without rubbing and get to a vet.
When to call your vet
- Shivering that doesn't stop once your cat is indoors and dry.
- Weakness, trouble walking, slow or shallow breathing, or pale gums.
- Collapse or unresponsiveness: treat it as an emergency.
- Ear tips, tail or paws that look pale, grey, bluish or dark, or hurt to touch.
- If you think your pet ate something toxic, such as antifreeze, call your veterinarian or an animal poison control line right away.
Our picks for keeping cats warm
A warm, dry place to rest does most of the work. These pieces from our catalogue cover indoor sleepers and outdoor shelters.
- Natural Wool Pet Cave, Hand-Felted Cat Bed: A hand-felted natural wool cave for cats who like to burrow; the enclosed shape gives a chilly cat a draught-free place to curl up.
- Cat Tree Kitty Tower with Sisal Mat Scratching Post, Cat Bed, Cushion and Perch: Lifts your cat's bed and perch off cold floors, with a cushion for napping and a sisal mat for scratching.
- 2-Tier Rattan Cat Nest with Removable Padded Cushion: A padded two-level nest; the cushion comes out for washing, which matters when beds get daily use all winter.
- Outdoor Insulated Cat House with All-Round Foam Insulation for Winter: Foam insulation all the way around makes this a solid base for a community cat shelter or a back-porch retreat. Add straw inside for dry bedding.
Find more warm options in our cat beds collection, or browse outdoor cat houses and catios for shelters.
Frequently asked questions
What temperature is too cold for an indoor cat?
There is no single official indoor number. Most cats are comfortable in a normally heated, draught-free home with warm places to sleep. Watch your cat rather than the thermostat: shivering, curling into a tight ball, unusual tiredness or cold ears, paws or tail suggest they need more warmth. Kittens, seniors and hairless cats need extra help.
Can a cat stay in an unheated garage in winter?
It is not a good long-term option. An unheated garage can get nearly as cold as outside and adds hazards like antifreeze, warm car engines and open dryers. If a cat must stay there briefly, provide an insulated shelter raised off the concrete, dry bedding, unfrozen water and a litter box, and check on them often.
How long can a cat be outside in freezing weather?
Not long. Washington State University's veterinary hospital advises that most cats should spend no more than 10 to 15 minutes in freezing temperatures before reaching a warmer space. Wind, wet fur, age and coat type all shorten that time. Cats who live outdoors need an insulated, straw-filled shelter they can reach at any time.
What are the signs of hypothermia in cats?
Early signs include shivering, anxiety and moving slowly. More serious signs are weakness or trouble walking, slow or shallow breathing and pale gums, while collapse or unresponsiveness is an emergency. Bring the cat inside, dry them, warm them gradually with blankets rather than hot water or heating pads, and call your vet right away.
Do cats get cold at night?
Yes, especially when the thermostat drops overnight or their bed is near a draughty door or window. Give your cat a covered or padded bed off the floor in a warm room, and check kittens, seniors and hairless cats more often. If your cat curls into a tight ball or feels cold to the touch, add warmth.
Sources and further reading
- Cats Protection — Keeping cats warm and preventing hypothermia
- Washington State University Veterinary Teaching Hospital — When is the cold too cold for your pet?
- Environment and Climate Change Canada — Wind chill and the Wind Chill Index
- VCA Canada — Frostbite in Cats
- Cornell Feline Health Center — Cold Weather Tips for Cats
- Cornell University College of Veterinary Medicine — Keeping your furry friends safe during winter weather
About this guide
Researched and written by the Pet Care Store Canada Team for pet owners across Canada. We build each guide from veterinary, government and animal-welfare sources (listed above) and update it when guidance changes.
This article is general information, not veterinary advice. If your pet seems unwell or you think they ate something harmful, contact your veterinarian or an emergency animal clinic right away.
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