First of all, I'm the kind of guy that actually did get (or even exceed) EPA fuel economy ratings on the ICE cars I drove, summer and winter. I have a long, mostly freeway commute and tended to stick to the speed limit and stayed in the right lane with cruise on. I've been driving my Model S in a similar fashion. When I picked my car up in early March, it was unseasonably cool with temps just above or just below freezing for most of the day. This weather carried on for most of March and early April. Even taking it easy on these drives, I was getting well over 600 Wh/mi and sometimes over 750. Nowhere near the 300 (rated) I was shooting for. My lifetime average (I am leaving Trip 2 alone) was somewhere in the 600's. I have about 2,800 miles on the car so far. Well, last week we had a freak weather system come through and the temps went up to 85 and a torrential rainstorm passed through. There was even a tornado nearby. That day, driving home at 60 to 65 MPH in the pouring rain, with headlights and a/c on, I was averaging 209 Wh/mi over 30 miles and my projected range was way, way over rated. I wanted to take a picture of the screens with my cell phone, but thought better of it, driving on the freeway in the rain and all. Over the next couple of days it remained warmer and I continued to have no problem beating rated range, getting in the mid 200's even when driving 65 to 70 MPH. I guess my point is that I'm surprised that there is THAT much of a difference, and I wonder what a true mid-January Canadian winter is going to look like next year.