Search Menu
Basenji looking out of a car window in the rain.
marioav /

You likely know about the dangers of leaving your dog unattended in a hot car. But, what about when it’s cold outside? While you might think it’s safe to park your pet during the winter months, the potential for harm, while not as high as in the summer, is still substantial. Your dog may enjoy the winter weather and colder temperatures while on walks, but dangers still remain for a dog in a car that’s left unattended in any weather.

Risk of Hypothermia

A car can act like a greenhouse in the summer, becoming much hotter than the environment outside. Likewise, in winter, cars without heaters running become rolling refrigerators, conducting cold from the outside. Cars have little to no insulation against outside conditions. So while your vehicle may shelter your dog from the wind and elements, it does not protect from frigid or freezing temperatures. And it can be dangerous to assume that your dog’s fur will be enough to protect them from extreme cold.

Left alone in a cold car for too long, dogs can develop hypothermia, a dangerous condition that occurs when the core body temperature drops too low. For dogs, mild hypothermia begins to set in when their temperature drops below 99 degrees Fahrenheit. Frostbite can become an issue at extremely low temperatures. If left untreated, hypothermia can also result in cardiac and respiratory failure, brain damage, coma, and even death.

Signs of Hypothermia in Dogs

Shivering and curling up for warmth are some of the first signs of mild hypothermia in dogs. Other signs to watch for, according to the USAR Veterinary Group, include the following:

  • Increased heart rate, followed by a slow heart rate.
  • Rapid breathing, followed by progressively slower and shallower breath.
  • Sluggishness and delayed reflexes.
  • Depression.
  • Paleness.
  • Dilated pupils.
  • Loss of consciousness.

Dogs at Risk in Cold Cars

While it can be dangerous for any breed of dog to be left too long in extremely cold temperatures, some dogs tolerate the cold weather better than others. Northern breeds with thick coats, such as Alaskan Malamutes, Siberian Huskies, or Saint Bernards are bred to withstand colder climates and harsher conditions. But single-coated and short-haired breeds have a much lower tolerance for cold temperatures.

Puppies and senior dogs of any breed are also more susceptible to hypothermia, as are naturally thin breeds such as the Italian Greyhound. Small dogs and toy breeds are also less able to tolerate cold temperatures than larger breeds. Lastly, hairless breeds like the Xoloitzcuintli are especially poorly insulated against cold temperatures.

How to Help Prevent Hypothermia

Ideally, if you’ll be stopping somewhere your dog isn’t allowed, leave your dog at home, or bring a human passenger who can stay with them and keep the heater running. If you must leave your dog alone in a parked car, keep your stop as short as possible, and dress your pooch for the wintry occasion with a dog winter coat or dog sweater. Provide plenty of blankets for your pup to burrow into and trap their own body heat. If you notice shivering or other signs of hypothermia starting to set in, quickly cover your dog and turn on the heat to warm them up. For more serious signs, get them to a veterinarian immediately.

Mind the Laws About Dogs in Cars

Many states have laws against leaving your dog in a parked car, regardless of the season. There also exist statutes that protect anyone who breaks into your car to rescue an endangered dog. While not all states have laws that address leaving dogs in cars, some have prosecuted dog owners for parking their pets in dangerous conditions under animal cruelty laws. If your dog requires treatment for hypothermia after being left in a car, you could face criminal prosecution.

As much as your dog may love to ride in the car, you can’t take your pet everywhere you go. The risks of leaving dogs behind in a parked car are simply not worth it. Plan special outings for your car-loving dog that don’t involve stopping at places where pets aren’t allowed, and save other errands for when your pup’s not with you.

This article is intended solely as general guidance, and does not constitute health or other professional advice. Individual situations and applicable laws vary by jurisdiction, and you are encouraged to obtain appropriate advice from qualified professionals in the applicable jurisdictions. We make no representations or warranties concerning any course of action taken by any person following or otherwise using the information offered or provided in this article, including any such information associated with and provided in connection with third-party products, and we will not be liable for any direct, indirect, consequential, special, exemplary or other damages that may result, including but not limited to economic loss, injury, illness or death.

Related article: Does My Dog Need a Winter Coat?
Get Your Free AKC eBook

Emergency First Aid for Dogs

Even the most responsible pet owner can't always protect their pet from a sudden accident or illness. Getting your pet immediate medical attention can be the difference between life and death. Download this e-book to learn more about what to do in an emergency situation.
*Turn off pop-up blocker to download
*Turn off pop-up blocker to download