Temperature tolerance in cats varies, but practical guidance suggests that most healthy adult cats start to feel uncomfortable as indoor temperatures fall below about 50–60°F (10–15°C), and become uncomfortably cold below roughly 45°F (7°C) if exposure is prolonged. Extremely cold conditions (roughly 32°F / 0°C and below) raise the risk of frostbite and hypothermia, and outdoor exposure at those levels is unsafe for most cats. Individual cats—pats, fur length, age, health, and whether they have access to shelter—will shift these thresholds. Key points to keep your cat safe in cold weather:

• Provide a warm indoor space: a cozy bed away from drafts, with blankets or a heated bed if possible.
• Ensure access to shelter outside: if outdoor access is necessary, offer a dry, wind-free, insulated shelter off the ground.
• Monitor at-risk cats: kittens, senior cats, or cats with thin coats may tolerate cold less well; bring inside sooner and create extra warmth.
• Watch for signs of cold stress: shivering, reluctance to move, lethargy, slowed breathing, or frostnip/frostbite on ears, paws, or tail.

If you have a specific climate, cat type, or situation (indoor-only vs. indoor/outdoor, age, health conditions), I can tailor the guidance further.