Temperatures have plummeted to below-average across Australia, with the freezing conditions set to continue. Canberra shivered through minus 5.6C just before 6am on Tuesday, with drivers warned to take extreme care because of icy conditions. It was 1.3C in Sydney’s Penrith, 1.8C in the Melbourne suburb of Viewbank and minus 3.9C at the Oakley defence […]