On Saturday, 4 January 2020 09:29:42 UTC, Norman Lynagh wrote:
Penrith, in the western outskirts of Sydney, recorded a max temp of
48.9° today, easily the highest temperature ever recorded in the Sydney
area. The previous highest was 47.8° at Richmond in January 1939.

Many other localities in NSW/ACT broke their all-time record max today,
including

Griffith 47.2
Narrandera 47.4
Wagga 46.0
Albury 46.1
Canberra 43.6

Is Australia on course to becoming uninhabitable by people of European
origin?

--
Norman Lynagh
Tideswell, Derbyshire
303m a.s.l.
https://peakdistrictweather.org
twitter: @TideswellWeathr

The maximum temperature at Canberra on 4th January was 44.0 C and 46.1 C at Wagga Wagga.
In the latest weather observations at Cabramurra, it does show that it recorded a maximum temperature of 63.3 C at 4.33 pm but at the bottom of the table it states that quality checks on data are not normally performed and it is possible for incorrect values to appear.
The Bureau of Meteorology website has detailed weather data much more than the Met Office website.