The warmest day was 44.0 °C on the 4th, and the coolest day was on the 6th when the temperature reached 21.5 °C at the Canberra Airport...
Canberra Airport reached 44.0 °C on the 4th. This is the highest temperature ever recorded in the ACT, exceeding the 42.8 °C at Acton on 10 January 1939.
But ... The Canberra Acton weather station was a weather station operated by the Bureau of Meteorology (BoM) in Canberra, ACT.It was located at 35.30°S latitude and 149.10°E longitude, with an elevation of an unknown value.The station was established in 1912 and closed on December 31, 1939, with its last available data being from December 1, 1939.
So BOM used two different stations many km's apart ... to come up with this BS ...