My part of southern MN, always said stop planting corn June 10, beans on July 4th.
Few go a little later on double crop beans behind peas, but that is a gamble.
Some try a tad later on silage corn behind alfalfa, but not for grain.
Sure is hard to figure it will work this late for corn.
Depends of course, if we get that once in 20 years fall weather that ends up perfect for you.....