hey august,
welcome to the forums. i m no expert and my zone is very different from yours. there are tables in the book of squarefoot
gardening which show planting times in relation to your last frost and first frost dates. this book will be available used for a small amount of money.
you
should look (
online?) for tables which show how long a plant will need from seed to harvest and calculate from that.
my thougts: green beans, peas ... maybe cucumbers?
greens, the typical winter greens, kale
kohlrabi?
very short lived crops, like lettuces, radishes, maybe carrots and beets
i would try to start at least some squash/pumpkin plants inside. i do not know much about your situation, but even a few starts on the window sill would be better than none at all.
or do starts in a not-so-optimal place. weak starts that would catch up would (probably) better than none at all. you might not get a full harvest, but a partial harvest is better than no harvest.
feel free to describe your situation. other people might join in and offer advice ...
good luck and blessings
tobias