I’m in Madison, WI and have been venting out a window to the outdoors without issue since February. I got a window seal plate, an adapter to attach the tube to the plate at the proper size, and some legit ducting clamps to help.
On the outside I’ve got a louvered dryer vent cover (not that one, but a similar one I picked up at Ace for a third of the price). The flaps close when air is not actively being forced out, and even the cheapo plastic one I got is chugging along in the teens here without the unit getting cold.
I know some folks also use blast gates to help with this but I’ve found that to be overkill with the louvered vent cover.
I live in a duplex and basically as long as you a) Talk to your neighbors and b) Vent somewhere pointed not like, straight at their air intake, you should be fine.