Winter, because Australia is in the Southern Hemisphere and the United States is in the Northern Hemisphere. The Southern Hemisphere is always the opposite of the Northern Hemisphere. :)
summer season in australia
Summer
Australia's summer is officially from 1 December to 28/29 February.
The Australian Summer corresponds to Winter in the USA. When it is summer in the US it is winter in Australia and vice versa.
Winter
Summer
Winter.
SUMMER
Summer
Summer
winter
It is winter.