Most cats are so good at grooming themselves that they do not need baths to stay clean.
Longhaired (if the hair mats), obese, or sick cats may need extra combing and brushing.
While cats in the wild do not have this luxury, you can help your cat stay healthy and clean if he struggles to do it for himself.
 

Outdoor cats experience a wide range of temperatures.

Since cats cannot sweat very well, they learn to seek shade in warm temperatures, and warmth in cold temperatures.

Indoor cats use shade, fans, bedding, and blankets to regulate their temperatures throughout the year.