There are winter vegetables, but most all of them will freeze if that happens. Clear plastic or glass cold frames can extend seasons, allowing you to grow longer and plant again earlier at the end of winter. There are many forms. Glass roofs. Hoop tunnels with plastic. Just old window laid across the top of the box. You can buy them like mini greenhouses.
You're within about ten days of your historical 50% probability first freeze date. So probably not for any young plants, nor any that a hard freeze will harm. By starting well before now, you probably could have been able to bring some things like kale and collards to harvest under cold frames before it just got too cold to manage.
In your place right now, I think I'd spend the winter preparing places to grow in the spring, planning and learning, and preparing to start seed indoors as spring approaches. It's very easy, and simple seed starter outfits are cheap on Amazon. But you need to read up on timing and how to "harden off", etc.
If you want, you can also play with simple hydroponics through the winter. You don't need elaborate set-ups. Your main concern will be providing enough light, but since hydro has become so popular, and not just for dope, the Chinese are in the grow light market and have brought prices down, but for many plants, conventional lighting works fine.
Here's a method that really works and provides greens year round. You need Mason jars, a small grow light (greens need less light than, say, tomatoes), black socks (covers the jar so it doesn't grow algae), some cheap 3" "net pots" (Amazon - they exactly fit quart Mason jars), some perlite or other medium and seeds. You also need some hydroponic nutrient. Don't use soil fertilizer - it lacks many nutrients that soil provides.
Here's a brief rundown on it, but there are many online resources. It's fun, easy, and it's growing your own food. Might hook you on hydroponics, too.
https://curiouscultivations.co...
Of course, with grow lights, you can also grow in soil containers indoors in winter, just as you would outdoors.
Beware of manufacturer hype on lights. They lie about how much growing space their lights will serve. Use the general rule of thumb of 40 watts of led lighting for each square foot of space.
Here's an example of what you can do cheap. This guy explains it well.
https://youtu.be/5z0NaYpVHMs
And here's a really good on start to finish with Mason jars. Note the cheap lighting that works fine with lettuce and such.
https://youtu.be/2ezeP1VAEoc
(Kratky refers to the professor who developed the method of hydro growing with no air or water pumps. It's the best way to start.)
