Should be cooler by nine

Last weekend was the first day of fall
I really don't believe that at all
Someone was either mistaken or lied
Seeing as it's ninety degrees outside

Not that I'm playing that at nine

The days are getting shorter
You all know what that means
We're not very far away
From dearest Halloween

Feeling lucky at nine

You know when the first is a Sunday
Something else will be in the works
It's no surprise when it happens
Just one of those calendar quirks

Back to school at nine

The days are getting shorter
(And cooler, I suppose)
Four months left in this decade
Don't you wonder where it goes?