It’s more than weather. I don’t believe it’s possible to achieve the advertised range on any public road in any weather. I can drive like an old lady and I’m nowhere close. Driving normally typically results in at least 75 miles below advertised range and I live in a warm place.
That said, the range hasn’t been a problem. I always have enough range. It’s not really something consumers need to worry about because you can drive like you stole the car and still have plenty of juice to get to the next Supercharger.
However, it is a problem that the stated range is so far off the mark. You sort of expect it to be off in every car under normal driving but possible if you drive in a way to extend range. That’s not the case with Tesla. Their range estimates are entirely misleading like so many other things with the car.