The coolest climate in Australia is found in the Australian Alps, specifically in the high country of Victoria and New South Wales.

Here's why:

* Altitude: The Australian Alps have the highest elevations in the country, with peaks reaching over 2,000 meters (6,500 feet). Higher altitudes mean colder temperatures.

* Latitude: While Australia is mostly located in the Southern Hemisphere's tropics, the Alps are far enough south to experience cooler temperatures.

* Mountainous Terrain: The mountainous terrain creates a unique microclimate with lower temperatures and increased snowfall.

Within the Australian Alps, areas like Mount Kosciuszko, Thredbo, and Falls Creek experience the coldest temperatures in the country. These areas often see snow during winter, with the coldest months averaging below freezing.