If Canberra dips to zero tonight, as expected, it will be the coldest pair of November nights on record.
“Parts of southern New South Wales and the Australian Capital Territory endured their coldest November night in over forty years, with the region set to chill again tonight.

The ACT saw some of the coldest temperatures, with Canberra Airport dipping to -1.5 degrees, its coldest November night since 1970. Tuggeranong fell to a chilly 1.2 degrees, its coldest November night in a decade.

http://www.weatherzone.com.au/news/chilly-november-nights-for-southern-nsw-and-act/25808