When an infection occurs the immune system is activated and increases the temperature to fight off and kill the infectious organism. What is the temperature for a cat. Fun Facts Body Temperature Human 38 Degrees Celsius Cat 38 39 2 Degrees Celsius British Shorthair Cats British Shorthair Kittens Beautiful Cats Disease or prolonged exposure to heat or cold can send a cats temperature above or below the normal range. . The normal body temperature in cats is 100 1025 Fahrenheit 377 391 Celcius. The formula can be used to convert Fahrenheit F to Celsius C. A cats normal body temperature falls between 38C and 39C. 37 C is a value that one encounters probably more often than any other temperature reading. Cat Health. If it gets too cold for your cat you can bump up the heater to 32C. Checking your cats vital signs at home is a great way to gauge their health particularly if you feel theyve been acting a bit off....