@chris @OctaviaConAmore
...and for that matter, IC engines often don't work that well in the cold either -- especially diesel, which turns into a gel at room temperature and has to be pre-heated before starting the engine when it hasn't been running -- and obviously more heating is needed the colder it gets.
...but I remember people in Rhode Island (which isn't that far north) sticking electric heaters under their hoods so the car would start quickly the next morning. (Maybe this isn't as much of a thing with electronic ignition? I was there from 1985-1989...)
...and I suspect that to the extent it's a problem, e-cars can be outfitted with battery-heaters which can be run off A/C mains so as not to drain the batteries while keeping them warm overnight.
Yet another non-problem which the established interests want everyone to believe is a show-stopper.