9news.com.au | Temperatures plunge up to 10 degrees below average across Australia's south 9news.com.au The mercury has plummeted up to 10 degrees below average across southern Australia as a strong front moved across the region. Frost formed in all of the southern states and was severe in some areas this morning, with temperatures dipping five-to-10 ... Australia freezes through its coldest morning in 23 years as icy front sweeps across the nation's south and heads ... |