Are you in snow country where once the snow flies, the ground will be covered and frozen?
If you can expect the ground to not freeze for a while yet, then you have plenty of time. In fact some weeds will come up easier after they are killed off by frost and freeze. Just go out on warmer days and pull up what you can. It doesn't all have to be done in one day. You also don't have to PULL the weeds, just cut at the ground level if you are going to smother with the cardboard and mulch.
Cardboard and mulch, as imafan mentioned, is absolutely the simplest way if the area is small enough. You can scrounge for oversized cardboard in the mean time.
It's OK to leave the pulled/cut weeds on the ground where they will be covered by the cardboard. Just try to level the area out first. You will need to wet down the cardboard. Use buckets of water if you can't use the hose.
If you will have snowcover for much of the winter, then all you need to do is put the cardboard down and keep from blowing away with bricks or rocks, and let the snow be the mulch.
If you absolutely don't have the time to deal with the weeds -- you will have to do all of this next spring ...pull or cut down, cardboard and mulch, etc. AND it will take at least another month before the area will be ready to plant afterwards, which will delay your start and limit what you can grow successfully if you have a short growing season.
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