Weather With You

Quick question for Aussies on my flist who may happen to be reading this -- what do you consider the winter months to be? And what sort of weather, temperatures etc do you get in them where you are?

(It's for the Checkmated R/Hr 'winter' challenge -- but since it doesn't have to be set in Northern hemisphere winter, one possible scenario has the two principals flying off to Australia together to find Hermione's parents ... in which case I could use a little local colour. :D)