But for all this, the most obvious heat gauge was the cicada.
Synonymous with summer, these clamorously amorous sun-lovers have been singing up a storm this past week. I've been waiting for the noisy boys all season.
Maori call them kihikihi-wawa - the gloriously onomatopoeic term means "to roar like the sound of heavy rain".
At the weekend their soundtrack drowned everything. Listening to their performance in the backyard I could hear none of the usual urban soundtrack. No dogs, no lawnmowers, no kids, no domestics, no muscle-cars.
Bliss.
But the highlight came at 1.46am yesterday where they found song in a bizarre late encore. The usually diurnal insects switched to nocturnal in deference to the heat. They sang for 12-odd minutes then, just like that, stopped.
Like a beach at high tide it was a kind of pandemonic peace.
So while Art Deco fans will (quite rightly) remember the weekend for its success, I say it was the weekend of the cicada.