I'm picking my tomatoes when they show a little red and letting them ripen inside. This seems to work better in the fall than vine ripening. The squirrels occasionally try a few bites and the slugs sometimes find them. I'd rather grab them ASAP and keep them in a big bowl inside to ripen.
Its already late October! The tomato leaves are starting to yellow and some are drying up and turning brown. Our temperatures have cooled off here in the Boston area (zone 6b), but my guess is maybe a month yet until we frost. Just a guess ...