The average body temperature of a healthy adult cat typically ranges from 100.5 to 102.5 degrees Fahrenheit (38.0 to 39.2 degrees Celsius). It's important to note that a cat's body temperature can vary slightly depending on factors such as its age, activity level, and the environment. Monitoring your cat's body temperature can be a helpful way to assess its health, as a significant deviation from the normal range can be a sign of illness or fever. If you suspect your cat may have a fever or is otherwise unwell, it's a good idea to consult with a veterinarian for a proper diagnosis and treatment.