Core answer: Yes, cats can get cold at night, especially if outdoor temperatures drop or indoor warmth is insufficient. They often seek warm spots and may show signs of cold stress if exposed to cold for extended periods. Key points

• How cold is too cold: Many sources suggest that indoor temperatures should feel comfortable to humans and that cats do best above roughly 60–65°F (15–18°C). Outdoor exposure below 45°F (7°C) can be uncomfortable for many cats, and temperatures near or below freezing can risk hypothermia or frostbite if prolonged or if fur is wet. However, tolerance varies by coat type, health, and acclimation. If you’re unsure, provide warmth and shelter indoors at night [general veterinary guidance; see sources discussing indoor warmth and cold risks].
• Signs a cat is too cold: curling up tightly, shivering, cold ears/nose/paws, lethargy, slowed breathing, reluctance to move, or seeking warm places (sunlit spots, near radiators, blankets) are common indicators [general veterinary guidance].
• What to do: keep cats indoors at night when possible, ensure access to a warm bed or blanket, provide a draft-free resting area, and offer a safe heated option like a low-wattage pet-safe heating pad or a bed with internal insulation. If a cat shows signs of hypothermia (very slow breathing, confusion, pale gums, lethargy) or frostbite, seek veterinary care immediately [practical care tips from veterinary and pet-welfare sources].

Quick practical tips

• Create a warm retreat: a lined bed off the floor, away from drafts, with a fleece blanket.
• Warmth without overheating: avoid placing cats on hot radiators or space heaters; use pet-safe heating pads designed for low heat and turn off when unsupervised.
• Night routine: ensure doors/windows are closed, and consider a closed, indoor-only environment to prevent exposure to cold drafts.
• Monitor weight and health: significant weight loss or health changes can reduce insulation and increase cold sensitivity.

If you’d like, tell me your location, whether your cat is indoor-only or outdoor, and any health issues, and I can tailor specific warmth strategies and warning signs to watch for.