How does the climate of northern Western Australia differ from the climate of the southwest?

The northern and southwestern regions of Western Australia experience starkly contrasting climates.1

• Northern Western Australia: This region features a tropical climate characterized by a wet-dry monsoon pattern. The wet season typically occurs from December to March, during which the area is susceptible to tropical cyclones that can bring significant rainfall to the landscape.1
• Southwest Western Australia: In contrast, the south experiences a Mediterranean climate. This area is influenced by the movement of anticyclones and the "roaring forties," which bring cool, cloudy weather and rainfall primarily during the winter months.1

While both the extreme north and the extreme southwest are the wettest parts of the state—each receiving more than 55 inches (1,400 mm) of mean annual rainfall—the timing and drivers of these precipitation patterns differ significantly due to their respective tropical and temperate influences. Additionally, while the north remains consistently hot, the southwest experiences more seasonal temperature variation, with occasional frosts in winter and relief from summer heat provided by coastal sea breezes.12