 In contrast, western suburbs such as Liverpool and Penrith have 41 and 67 days with temperatures above , 10 and 19 days above , and, 1 and 4 days above , respectively.The highest recorded maximum temperature at Observatory Hill was on 18 January 2013 during a prolonged heat wave across Australia from early December 2012 to late January 2013.The highest recorded minimum at Observatory Hill is , registered on 6 February 2011.