Isn't this Indian Summertime in the MidWest? I remember hot sunny days intermingling with cool Fall when I attended school in the Midwest. It was a wonderful respite for a young person coming from Hawaii.
For us here on the islands, it used to be that by mid-October we would have consistent mid 70s temp. Now, it's in the mid to high 80's. The climate has definitely gotten warmer.
It's surprising how the temps fluctuate..It was so damp here in MA I had to put the heat on as the dampness goes through to the old bones..I will have to remember to set the temp back tonight...I got about four numbers tonight..