The yowl is often a cat-to-cat communication; it can mean “I want to mate,” or “I don't want you coming around my place.” It can also occur when a cat isn't feeling well, when senses or cognitive functions decline, or when something in her environment (perhaps a new cat on the block) isn't to her liking.
Why do cats yowl at night?
Cats are crepuscular creatures, however, meaning they are most active at dusk and dawn. Your kitty is programmed to kick into high gear right at the crack of dawn when it may still feel like the middle of the night. This burst of energy can contribute to the howling.
How do I stop my cat from yowling?
When he starts yowling, try to have as little interaction with him as possible. Instead, toss him an interactive toy that he can play with on his own, and then go back to bed. Or, if you can stand it, ignore him. I had a cat who would wake me up every morning at daybreak and expect me to go downstairs and feed him.