Yes, Australia does celebrate Christmas in summer. While the northern hemisphere is enjoying cold, snowy weather during the winter holidays, Australia is basking in the sun and enjoying outdoor activities like barbecues and beach picnics. However, despite the different climate, the spirit of Christmas remains the same, with families gathering together to celebrate the holiday and exchange gifts. In fact, Christmas is one of Australia's most popular holidays, and it's not unusual to see Christmas trees and decorations decorating houses and shops, even in the warm weather.