Loosen the reigns a bit and do some experimenting. I planted beets in early August, and carrots, broccoli and lettuce since then. They have needed some extra water (from the rain barrel) to get started, but all seem to be doing fine. Plants don't demand perfect conditions... just tolerable ones.

The high temps on Sep 1, where you are, are very short term. Since I'm a little late with my note, this has probably already changed.

But you also have some confusions here....

For fall greens like lettuces, spinach, maybe a late crop of peapods, all those things that germinate and grow pretty quickly, you probably wanted to get those seeds in the ground in or around mid to late August. If the weather cooperates, and the freezes hold off well this year, you might be able to plant them now, and get some yield, at least for the lettuces and spinach.

For some of the other things you mentioned [cabbage, cauliflower], these are long-growing-season things. They are, in several ways, a fall *harvest*, but need to be planted in late spring, or early summer at the latest.

"Root vegetables" is very broad. In the northern LP, beets could have been planted a few weeks ago, or now if the weather holds, for the top-greens for salads. Won't have the time to get true beets. Carrots a few weeks ago, if your soil is excellent and the weather holds, and all you want is little fingerlings. Other root crops are long-season. Need to be planted spring-early summer.