I always pictured Australia as a dryer always warm location. Sort of desert tropical. I didn’t think in terms of winter and snow. I thought dry season and wet season.
It's a big place so lots of different climate zones which is why I asked for the location. South has cool, wet winters (though not cold like much of USA cold) and warmer, drier summers. Far north is close to tropical with definite wet and dry season though little change in temps. Trying to grow Japanese maple up there is futile though higher on the tablelands there are places with definite cool winters where growers can keep temperate species.
A friend living in the higher elevations of the great dividing range has to protect bonsai from regular snowfalls through winter but that's a very small part of the country and there would be many Aussies who have never seen snow in person.
Ocean moderates coastal climates so close to the coast frost is rare and summer temps don't get anywhere near as high as inland.
Most coastal areas get good rainfall except some of the west coast which is drier.
Further inland it gets drier and hotter in summer. Some inland areas are almost desert.
You can see there's quite a lot of variation which dictates what species we grow in different parts of the country.