As a Winnipegger who owns an electric car, I can truthfully say that operating an electric at those temperatures is completely fine. Yes, the range is reduced, but as long as you account for that in planning when you plug in, then there's no problem. Of course, take that with a grain of salt snow, as my daily commute is never more than 40km.
I own a Mistubishi I-miev. Other owners of this car have done the math and according to them (I'll find the source if I have to), after 7 years of operation you start 'making money'. No maintenance costs, no belts, only fluids are for the mechanical brakes (which are hardly used anyways because of regenerative braking). Plus I live in a place where all electricity is hydro, so it's quite cheap. I am lucky.
Just wanted to say I absolutely love the car, and while I understand there's some of negatives regarding the production and use of the things, I like believing that early-adoption has enough benefits to outweigh those.