I work in Brisbane in a airconditioned office (softy) but I have a few mates that work in the building industry. they do moan about the summer though. The plasterer (from the UK) says he has to work twice as hard cause the gear drys twice as fast. The builder say that in summer its uncomfortably hot and when its not its raining so hes looses money. but the real heat is only for 3 months of the year spring and autum are great and the winters are very pleasent.
I think once you have been here a year you will aclimatise and love the weather.