It really depends on what you’re used to. You look like having around 35c this weekend, that’s just normal summer weather for Australia.
I’d use the aircon or if you don’t have that, a fan. Make sure you stay hydrated. If it’s too hot, go to a shopping center or a movie which is most likely going to have aircon.
35 is nice, I’d have more trouble coping with your winters I think.
There is bunch of regulations that makes it hard to get permission to install it. People rarely have it in their homes. At commercial buidlings its more common.