Canberran winters are the coldest in Australia and one of the coldest in the world. Don't let the temperature guide fool you. Wind chill is a major factor in winter here. Officially, it goes down to -15 Celcius in the middle of winter, but it does feel a hell of a lot colder than that. You have been warned.
Don't get complacent -- if you go out in the bush, go prepared for inclement weather. A pleasant hike can turn into a life or death situation with just a little precipitation and even mild temperatures.