I don't know, I saw "The Man from Snowy River" and that looked pretty cold.
The are parts of Australia that get below 0° F at times too.
The Snowy River begins on the slopes of Mount Kosciuszko, Australia's highest mountain, and still doesnt regularly get that cold.
Charlotte Pass, the closest village (ski resort) to the mountain is the "coldest place in Australia" according to wikipedia and has a record low of -9°F but still only gets down to a bit below -10°C / +14°F on a regular basis during winter.
edit to add: Weather Bureau information for Charlotte Pass says the lowest decile of minimum temperatures, for the coldest month, for the coldest village in Australia, is around -12°C / +10°F.