Because I just found that button. And yeah, it said -49C.
My apologies to Hitchhikers' fans. Synchronicity has not been achieved after all.
I wouldn't be surprised if I was wrong about my highest ambient temperature either. I do clearly recall that the humidex was 52C that day, though. I remember thinking that attempting to breathe at 52C is akin to breathing through pudding.
Still, it's probably best to disregard anything you ever read on this blog.