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Perth, the capital city of the state of Western Australia, has a Mediterranean climate (Köppen climate classification Csa), with hot, dry summers and mild, wet winters.. February is the hottest month of the year, with an average high of 31.7 °C (89.1 °F), and July is the coldest month of the year, with an average low of 8.1 °C (46.6 °F). 77.7% of rain in Perth falls between May and Septe
The Bureau of Meteorology is the main provider of weather forecasts, warnings and observations to the Australian public. The Bureau's head office is in Melbourne Docklands , which includes the Bureau's Research Centre, the Bureau National Operations Centre, the National Climate Centre, the Victorian Regional Forecasting Centre as well as the ...
A dried up Lake Hume, 2007 Drought-affected fields in the Victorian countryside, 2006. Drought in Australia is defined by the Australian Bureau of Meteorology as rainfall over period greater than three-months being in the lowest decile of what has been recorded for that region in the past. [1]
Rainfall forecasts can be verified a number of ways. Rain gauge observations can be gridded into areal averages, which are then compared to the grids for the forecast models. Weather radar estimates can be used outright, or corrected for rain gauge observations. [4] Several statistical scores can be based on the observed and forecast fields.
In 2090 Perth is predicted to have the rainfall of Yanchep today and the temperature of Geraldton using the RCP 4.5 scenario. [224] Rainfall is predicted to fall between -29% (-226 mm) and -8% (-66 mm) and temperature predicted to rise between 0.9° and 4°. [224]
During the warmer summer months, low-level surface troughs normally cross over the west coast of Australia, which often leads to isolated thunderstorm development in inland Western Australia, only occasionally reaching the coast (such as on 20 December 2009, when a storm developed south of Perth and gave the city of Mandurah 2.8 millimetres (0.11 in) of rain for the month).
A significant reduction in winter rainfall has been observed with a greater number of extreme rainfall events in the summer, [89] such as the slow-moving storms on 8 February 1992 that brought 120.6 millimetres (4.75 in) of rain, [86] [87] heavy rainfall associated with a tropical low on 10 February 2017, which brought 114.4 millimetres (4.50 ...
The Scarp, like the rest of south west Australia, has a Mediterranean climate, with mild rainy winters and warm dry summers. Average annual rainfall is 1300 mm along the scarp, declining to the east and north. [4] Often the Bureau of Meteorology identifies different weather for "the hills" in comparison to that of the Swan Coastal Plain. [5]