When we arrived in Melbourne, it was the end of June, temperature was above +10C during a day and above +2C during a night. And I suppose it was the coldest winter time, because since July temperature is about +15 during a day and +(5-8) during a night. It seems unbelievable for person like me who get used to temperature -20C in winter. But sometimes in the apartments may be very cold, especially in the morning because there isn't central heating. There is a air-condition in our apartments, but it isn't very useful considering that it is located in the living room whereas in the bedroom is empty. So we bought a heater and put it there.