I have noticed a hit to the range in sub-freezing weather, but I'd guestimate it at something along the lines of a 15% reduction in range. However, when combined with the original user's stated speed for the trips (around 70mph) I could see that being a bad combination. I do notice a slight hit to range at 70+mph speeds. If I wanted an AWD EV that has decent range in cold weather at higher speeds, I'd probably have gone with a base model S instead.
Best,
Best,