Yours look about like mine right now. Concords are a purple grape so yours are GREEN and not ripe yet.
I have a 'green' eating grape and they will turn more of a red in the fall and are a zillion times better red and ripe.
I will lose a few to shrivel, spots, and bugs between now and purple.
Edit, I'm in 6b and my concords will be ripe in another month to six weeks. I try to let them go as late as I can without them shriveling as they get sweeter as they go, and usually pick between mid September and whenever they offer we'll get frost.