Coober Pedy weather is actually mild compared to much of Aus. Where I am the temperature ranges from 0 to 42C, Vic Balshaw gets a little colder and has about the same highs (and he is over 1000km away) and similar for many other Aussies
To quote wiki on Coober Pedy
Typical of a desert climate, diurnal ranges are wider than in most places, with an annual average high of 27.8 °C (82.0 °F) and an annual average low of just 14.2 °C (57.6 °F). Summer temperatures range from 35 °C (95 °F) in the shade, with occasional dust storms.
Aus in general is mild compared to California and Siberia and other places.
To quote wiki
The highest temperature ever recorded in Australia is 50.7 °C (123.3 °F), which was recorded on 2 January 1960 at Oodnadatta, South Australia, and 13 January 2022 at Onslow, Western Australia. The lowest temperature ever recorded in Australia is −23.0 °C (−9.4 °F), at Charlotte Pass, New South Wales, on 29 June 1994.
Compare that with the US/Canadian prairies or Siberia and then you know what a real temperature range is.
As Siberian weather is rolled into Russian weather I can not find the full details (one site several years back had Siberia's highest as 50.2C but according to Wiki the real record high is a "mere" 100.4F = 38C in a town that has a record low of −67.8 °C (−90.0 °F). A temperature range of 105.8C or 190.4F in a single town. That makes Aus's 73.3C range for the whole country pretty benign.
To quote Wiki again
Verkhoyansk holds the record for the hottest temperature ever recorded north of the Arctic Circle, with 38.0 °C (100.4 °F), and it also holds the record for the coldest temperature ever recorded in Asia, −67.8 °C (−90.0 °F). The cold record is shared with Oymyakon.
From the US NOAA Cow Creek weather station in Death Valley has a recorded range of +52 to -7 C or 19 to 126F for a single site. Death Valleys valley record seems to be 66C or 143F - shabby compared to Verkhoyansk but way more than any single place in Aus.