How Cold Is Too Cold for Cats Outside? Safe Limits and Signs

For most healthy adult cats, temperatures below about 45°F (7°C) are uncomfortable, and anything near or below 32°F (0°C) becomes risky if the cat stays out for long. Below roughly 20°F (-7°C), even a thick-coated cat can develop frostbite or hypothermia within a short time. These are general guidelines, and wind, wet fur, age and health move the limits up or down.

A cat that lives mostly outdoors and has grown a winter coat copes better than an indoor cat that slips out for an afternoon. Use the ranges below as a starting point, then adjust for your own cat.

What temperatures are safe for an indoor-outdoor cat?

A rough guide for a healthy adult cat with a normal coat:

• Above 45°F (7°C): comfortable for most cats for normal outings.
• 32°F to 45°F (0°C to 7°C): fine for short trips if the cat is dry and has shelter to return to.
• 20°F to 32°F (-7°C to 0°C): limit time outside and check that the cat can get back indoors at any moment.
• Below 20°F (-7°C): keep the cat indoors.

Treat these numbers as air temperature. Wind chill and damp fur make a cat lose heat faster than the thermometer suggests, so a windy 35°F day can feel harsher to a cat than a still 25°F one.

Which cats should not go out in the cold at all?

Kittens, seniors, cats with chronic illness and thin-coated or hairless breeds lose body heat faster and should stay in during cold snaps. Kittens cannot regulate their body temperature well. Older cats and cats with arthritis, kidney disease, diabetes or heart problems tolerate cold poorly, and arthritis often hurts more in winter.

Short-haired and underweight cats have less insulation. Cats that were recently shaved or groomed short are also more exposed. If your cat has a health condition, ask your veterinarian where its personal limit sits. The page on indoor versus outdoor cats covers the wider trade-offs of letting a cat roam.

What are the signs a cat is too cold?

A cat that is too cold shivers, hunches with its paws tucked under, cries at the door, or seeks heat by pressing against walls and vents. As body temperature drops, the cat becomes sluggish, moves stiffly and may seem confused or very sleepy.

Watch for these signs of frostbite, which usually affects the ears, tail and paw pads first:

• Skin that looks pale, gray or bluish.
• Skin that feels cold and hard to the touch.
• Redness, swelling or blisters as the area warms up.
• A cat licking or guarding its ears, tail or feet.

If you suspect hypothermia or frostbite, move the cat somewhere warm and dry and wrap it in a dry blanket. Do not rub the skin and do not use hot water or direct heat such as a hair dryer or heating pad, which can burn skin that has lost feeling. Call your veterinarian or an emergency vet right away, because frostbite damage can take days to show.

Where do outdoor cats shelter in winter?

A cat needs a dry, wind-proof space just large enough to hold its body heat. A cat that lives outdoors benefits from an insulated shelter with a small entrance, a floor raised off the ground and dry bedding.

• Use straw as bedding. Straw stays drier than blankets or towels, which hold moisture and freeze.
• Raise the shelter off the ground and face the doorway away from the prevailing wind.
• Keep the entrance small so body heat stays inside.
• Check water bowls often, because water freezes quickly. A heated bowl made for pets is safer than leaving water to ice over.

Unplugged or poorly made heating pads and lamps are a fire and burn risk. Choose products made for outdoor pet use and follow the manufacturer’s instructions.

What dangers beyond the cold affect cats in winter?

Antifreeze (ethylene glycol) is highly toxic to cats, and it tastes sweet to them. Even a small amount can be fatal, so clean up spills and call an emergency vet or the ASPCA Animal Poison Control Center at once if your cat may have licked any. Road salt and de-icers can irritate paws and cause stomach upset if licked off, so wipe your cat’s feet when it comes inside.

Cats also climb under car hoods for warmth. Banging on the hood before you start the engine on cold mornings gives a hidden cat time to leave. Meanwhile, a cat that keeps sneezing after time outdoors may have caught an upper respiratory infection, which you can read about in why cats sneeze.

How do you make the indoor-outdoor routine safer in cold weather?

Shorten outings, keep a fixed return time and make sure the cat can come in without waiting. Feed an outdoor cat a little more in winter, since keeping warm burns extra energy, and make sure it has fresh water that is not frozen. Keep up with veterinary care, because an outdoor cat is exposed to more infections and injuries. The kitten vaccination schedule explains core vaccines for cats that go outside.

The American Veterinary Medical Association publishes general pet safety information, and your own veterinarian can tell you whether your cat’s age, weight and coat suit cold weather.

Quick answers

Can cats freeze to death outside?

Yes. Cats can die of hypothermia in severe cold, especially when they are wet, young, old, ill or trapped with no shelter. Bring cats indoors during extreme cold.

Is 40°F too cold for a cat?

For a healthy adult cat with a dry, full coat, 40°F (4°C) is cool but manageable for short periods. Kittens, seniors and sick cats should not stay out in it.

Do cats grow thicker coats in winter?

Many cats that spend time outdoors grow a denser coat as days shorten. A cat kept in a heated home most of the year grows less, so it is less prepared for a sudden cold outing.

Should I leave a cat outside during a cold snap?

No. Keep cats inside during very cold spells, and if a cat refuses to stay in, provide a dry insulated shelter and check on it often.