Just checked the current forecast. A front will make it to the area [Ohio] on Wed, but it is seasonally weak and will only cool things down a few degrees [77] on the high end, never even reaching the 50’s on the low end. The first relatively brisk front of the fall is forecast to move through on the Tuesday of next week, the 1st of October.
Which means that, for the entire north-central and northeastern US, we will have NOT seen a strong cold front for 23 days, to the end of September. The main branch of the jet stream hasn’t simply been weak over continental North America, it has been nonexistent.
Meanwhile, it is somewhere far away which is getting all that missing coolness and such: