If you keep the car warm, then you'll have no problems. Temperature has a great effect on chemical reactions. Charging a car battery relies on a chemical react

If you keep the car warm, then you'll have no problems. Temperature has a great effect on chemical reactions. Charging a car battery relies on a chemical reaction.* Cold weather -> poor charging. Just another environmental/infrastructure shortcoming that requires attention before EVs can become common enough to give economies of scale. They didn't warn you when you bought that EV that you'd need to garage it protectively enough in an insulated space to enable proper charging, did they? * Discharging a battery also relies on a chemical reaction. So same problem of poor chemical reaction arises when using that battery in cold weather to drive with.