On the eastern seaboard, from Brisbane down through Sydney and into Melbourne, the influence of the Pacific Ocean and the Great Dividing Range creates a more temperate, reliable rainfall belt. Here, averages range from 600mm to over 1,200mm. This narrow strip is where the vast majority of Australia’s population and agriculture resides, creating a disconnect between the lived experience of the average Australian (who sees regular rain) and the hydrological reality of the continent (which is largely dry).
In the north, the "Top End" experiences a tropical monsoon climate. Darwin and the Kimberley region endure distinct wet and dry seasons. Here, the annual rainfall can soar above 1,500mm to 2,000mm, most of it falling in just a few intense summer months. This tropical moisture is the lifeblood of the northern rivers, occasionally spilling south to revive the dry interior—a phenomenon the locals call the "rain bomb." what is the average rainfall in australia
Regions like Cairns and Darwin experience a distinct wet season (November to April). Cairns is one of the wettest spots, often exceeding 2,000mm annually. On the eastern seaboard, from Brisbane down through
This influences whether rain-bearing winds hit the southern coast or stay over the ocean. Impact of Climate Change In the north, the "Top End" experiences a
| Region | Annual Rainfall (approx.) | Climate Type | |--------|--------------------------|---------------| | Far North QLD (Cairns) | 2,000mm (79 inches) | Tropical monsoon | | Sydney | 1,222mm (48 inches) | Humid subtropical | | Perth | 730mm (29 inches) | Mediterranean | | Melbourne | 650mm (25.6 inches) | Temperate oceanic | | Adelaide | 540mm (21 inches) | Mediterranean/semi-arid | | Hobart | 615mm (24 inches) | Cool temperate | | Alice Springs | 280mm (11 inches) | Desert | | Birdsville (Qld outback) | 150mm (6 inches) | Arid desert |
But unless you live in a tropical rainforest or a temperate coastal city, that number feels wildly optimistic.
To understand rainfall in Australia, one must abandon the pursuit of a singular "average" and instead embrace a narrative of contrast, variability, and the tyranny of the El Niño-Southern Oscillation.