Dogs can often handle temperatures down to 20 F before they start developing health issues like frostbite and hypothermia.
However some dogs can only handle the cold down to 45 F to 32 F.
When the temperature is 45 F or lower some dogs start to feel uncomfortable and when temperatures get below 32 F small dogs and dogs that have thin fur coats and even very young, old or sick dogs start to get sick.
If the temperature outside is 32 F or lower they should not be outside for very long.
At temperatures of 20 F and below dogs become vulnerable to hypothermia as well as frostbite.
Dogs do feel the cold and the smaller dogs feel the cold more easily than larger dogs.
Also even large dogs with thin coats or fur will feel the cold sooner and more than a dog with a heavy coat.
Ideally if it's too cold for you then it's likely too cold for the dog.
The dog breeds that get cold easily are single coated dogs such as Dalmations, Fox Terriers, Vislas and Greyhounds.
Other dog breeds that get cold easily are small dog breeds and dog breeds with short hair such as Great Danes, Dobermans, Pit Bulls and Chihuahuas.
The dog breeds that don't get cold as easily are Alaskan Malamute, Siberian Huskies, Bernese Mountain Dog, Newfoundland Dog, Saint Bernard, Samoyed, Keeshond and the Chow Chow.
Chow Chow dog breeds have a thick double coat which sheds heavily and requires consistent at home grooming.
Keeshond dog breeds have a dense double coat and a thick ruff around their neck which helps to insulate them from the cold.
Saint Bernard dog breeds are from the Swiss Alps and have a dense coat which helps them stay warm in snowy and cold regions.
Samoyed dog breeds are from Siberia and are built to thrive in cold weather.
Newfoundland dog breeds have a heavy coat which protects them from the icy waters and was originally bred to work in cold weather.
Bernese Mountain Dog breeds have a thick, double layered and fairly long coat which makes it one of the most cold tolerant dog breeds.
Siberian Husky dog breeds have a thick double coat with a dense undercoat and a longer topcoat.
Alaskan Malamute dog breeds have a dense, double fur coat which helps them survive in extremely cold temperatures.
While some dog breeds are more tolerant to the cold it is typically recommended that no pet including dogs should be left outside when temperatures are at or below 32 degrees.
The Chihuahua is a small dog breed that really hates the cold and will shiver in some cases even when the temperature is 50 F.
Chihuahuas due to their small size and short coat mean they get cold very easily and often need sweaters, coats, and more to stay warm as temperatures start to dip.
One of the facts about Chihuahuas is that they may shake when they are nervous or excited, but, more often than not, they're shivering because they're cold.