Cats can tolerate temperatures between 45° Fahrenheit and 104° Fahrenheit. However, when the temperature outside dips below 45 degrees Fahrenheit for any extended period of time, cats may experience adverse effects. Even if the temperature is above 45, if there is rain or other inclement weather and the cat is outside for multiple hours, then hypothermia can result. Small cats, thin-coated cats, and older and young cats cant tolerate temperatures below 50 degrees Fahrenheit. Other cats with significant weight loss or diseases such as arthritis may be significantly uncomfortable at cold temperatures, even if the temperature only drops below 60 degrees Fahrenheit.

It is important to note that cats are very adaptable creatures, but unlike humans, they aren’t able to grab a sweater or blanket if they’re cold. Cats need to maintain a body temperature of above 90 degrees to ward off hypothermia, so keeping your thermostat around 70 degrees is a good way to ensure they’ll stay cozy all winter long. If you notice your cat snuggling more in the winter, or curling up in tighter sleeping positions to stay warm, it may be a sign that they are too cold. Signs of hypothermia in cats include shivering, curling inward, and eventually becoming quiet and less responsive.

In summary, anything below 45 degrees Fahrenheit is too cold for outdoor cats, and indoor cats prefer rooms hovering between 50-60 degrees. Small cats, thin-coated cats, and older and young cats are more at risk in terms of age. If you live in a place where the temperature dips to below 45 degrees Fahrenheit, hypothermia is a very real threat.