Depending on where you are you may be alright but not too short so you don’t stress the grass.
If you still have some good light and it’s not cold you can do the following
If less than 4” cut it down to 3” and you’re done.
More than 4”? Cut no more than 1/3 of it.
Give it a week or so and as long as there’s still some good light and it’s not too cold repeat.
You can read more here
https://www.homesandgardens.com/gardens/should-i-cut-my-grass-short-before-winter
Until that point, continue mowing once a week. Only once you’ve noticed your grass isn’t growing, or frost/snow covers your lawn, should you stop cutting it for winter. If the winter is particularly mild and the grass continues to grow, then carry on mowing occasionally throughout