What kind of clothes should I prepare for going to Australia in June this year? What is the weather like there?

Mid-June is the "late autumn" there (only July-August is winter). In Australia, it is dry at this time. The average temperature in Sydney is 12- 18 degrees Celsius. Personally, I think a sweater is enough. Strong thermal underwear may not be a problem. Melbourne is slightly 2-5 degrees lower (Melbourne's coldest winter in August is 8 degrees). You can wear sweaters, coats, thin coats or general warm clothes, but it won't be very cold. Some locals wear shorts in winter. Auckland, New Zealand is warm at noon, but it is cold in the morning and evening within one day. Average temperature 10- 15 degrees Celsius. Rotorua has never been there, but I know it is similar to Auckland and Wellington.

Of course, as the experts upstairs said, it is best to be prepared and put on more clothes, but overall, the temperature in mid-June in these places is the same as that before and after the Mid-Autumn Festival in the south, the difference is that it is dry there.