I was comparing the temperature here with the highs in Alice Springs and Darwin and Brisbane. It's far hotter down South here. It's not supposed to be desert!!

Darwin and Brizzy don't get so high as the proximity of the sea moderates their temperature. You may not be in the desert (yet) but that is where your airmass is coming from when you have the northerlies. 47C - poor you! Hope today is more kind to you.