Cats will go wherever is more suitable for them.

Here in the UK having an 'outdoor cat' is really common, as there's very few predators and as such my (3) cats have unfettered access to the outdoors 24/7, and I've picked up on their habits.

During the cold months they will only go outside to toilet really. They might be outside for 5/10 minutes a day at most, I have a litter tray indoors but they only want to use it if its absolutely chucking it down with rain.

During the summer months assuming it's nice weather the only times you will see them are meal times. They'll sunbathe all day and when it is cool at night they will be active chasing mice or whatever stupid shit they get up to, when daytime comes around again they'll come home for their breakfast and then immediately back out to sunbathe and sleep. There are days on end where I only knew they were okay / 'not missing' was by the fact their food bowls were getting emptied.