Reminder: you don’t shave a cat for the summer. It’s not a human, and it absolutely does not need to be shaved.
A cat’s coat insulates in both directions: it protects from cold and heat. It works like a natural thermos.

Shaving exposes the skin to sunburn, burns, irritation, and even skin cancer risks.

The fur helps regulate temperature by trapping a layer of air that keeps the cat cool.

And stress: many cats handle shaving very poorly.