Yes.. Brisbane can get hot in the summer. But, its all relative to what you are used to.

You will get the very occassional summer day that will reach close to 40deg C. But, that is generally something that will happen for a day or two, and then is normally followed up with a big summer storm, that will bring the temperature right down. One of the great things about Brisbane weather.

Brisbane probably maxes out in the low 30's in summer - generally, with minimums in the low - mid 20's. However, it is mostly a dry heat... doesnt get to humid. But on that note.....

North Queensland (i lived there for 3 years) tends not to get as hot temperature wise in summer, BUT, it is very high humidity - and I would personally not want to work on a roof in summer there.

Winter is mild in Queensland. We do get some cold days... but like the extra hot days, they dont normally last that long.

That all said... just about anywhere in Oz gets hot in Summer. In fact, places like Melbourne in the very south, get some horrendously hot days - and they can get very cold winters (much colder than Brisbane).

Brisbane really has the most manageable temeperature range in Australia. Gets hot, not too hot, gets cold, but not too cold.