By the fourth over the covers will be coming out and people will be sheltering from the showers under the bank-top palms.
It was the same last year - a southerly snap rolled through to "welcome" the colourful, blossom-clad floats in the great parade.
It's odd, because it seems to defy the theory of global warming which gets the blame for everything these days.
I daresay if we were to get knocked out of the Rugby World Cup global warming would come into it somewhere.
I can recall childhood years of attending the Blossom Parades and my memory (albeit an average piece of biological machinery) tells me they were occasions of sunshine and warmth.
Shorts and jandals.
But at the end of the day what really matters is not what the weather holds, despite the occasion being a sort of welcome to spring and the imminent summer days ahead.
It is all about celebrating the blend of blossom and the bay.
Of festival and fun.
The blossom markets and the family fun, and of course the big parade.
Who we are, where we are and what we have.
And what we may need to have today is a warm jacket or coat but hey, if the spring lambs can take a bit of a southerly on the chin so can we.