Shaving a cat is not recommended due to the inference shaving has with the animal's natural temperature regulation. Although shaving fur can theoretically cool down a cat during summer, it serves no benefit because a cat's fur is naturally adept at keeping it cool.
A cat has a high surface area compared to its mass, meaning that it can lose excess heat easier than larger animals. Some breeds of dog, can be shaved during warmer months due to their naturally thicker coats, which can include two layers. Dogs are vulnerable to sunburn, so keeping at least 1 inch of fur is recommended to protect from UV radiation and the occasional chilly evening.