We'll usually get a week or two of really hot weather like now over summer John, and lots of 80(+) degree days this time of the year, and it'll stay warm until around May, then it cools down (not cold like in the US, but down to around 50 over winter (from June to August) we do get a few days colder than that, but not many.
The biggest concern on days like today is fires, and sadly, many of them are deliberately lit. I've got a park behind my place, so I've got the hose ready, just in case. Cheers, Terry.