September, Summer?

I always think of crisp autumn mornings, roaring fires in the fireplace and apple cider; to name just a few things, when September rolls around.

It is never that way, though. All my life I've lived where September temps were still in the high 80's to low 90's and the "autumness" didn't begin until mid to late October.

So. . . why on the 1st of September do I sense leaves burning, fireplace smoke, put on a sweater - only to take it off because it's too hot - and a myriad of other sensations associated with the fall season. Does our body have an internal calendar telling us that regardless of what the weather outside is, the truth is that autumn is here?

Just random thoughts rambling around in my brain today.