In north-central Missouri, the temps cooled off to about the mid-70's for a high and down into the high-50's at night.
Still warm enough for a T-shirt and shorts at 4 AM when I walk the dogs. But yeah, the drop in temps happened pretty quickly.
October's my favorite month, especially when the leaves are coming down. The smell in the air is great.
September can be a mixed bag of sorts, but it's half-over now. Something tells me that global cooling is going to rear its ugly head this winter....