We just finished the wettest recorded September in Minnesota history. It was also on the cool side though I don't know if it was historic in any way. Last year we had a cool September and the coldest October we'd ever had. I'm hopeful that we avoid the same pattern.
A couple of weeks ago we had the official end of summer. Don't remember where but I read an argument somewhere to ignore the 'official' seasons and judge the times by when they make the most sense. The article pointed out that the solstices and equinoxes used to be regarded as the half way points. That's why Midsummer night is on June 21 even though that's the official beginning.
I think here we generally regard the beginning of Autumn as somewhere near the start of September and the end around mid November. That would start winter about five weeks earlier than it does 'officially'. Winter doesn't end here until sometime around the end of March or about a week after equinox. Spring is the shortest season, starting in April and going until the end of May.
Doesn't that sound about right?