wizeguy said:
One way into work.
==================
5 miles at 40 mph, 5.9 miles/kilowatt = .84 used
5 miles at 50 mph, 4.6 miles/kilowatt = 1.08 used
16 miles at 65 mph, 3.6 miles/kilowatt = 4.44 used
...
Occasionally I come home like this.
=====================================
24 miles at 70 mph, 3.3 miles/kilowatt = 7.27 used (I could go slower here to save a few watts)
6 miles at 40 mph, 5.9 miles/kilowatt = 1.01 used
We have a nearly identical commute! What you can expect is that (assuming a new Leaf/pack) the first 2 years you will easily make this distance with 15-20 miles to spare. (You can even run off 80% charges initially.) Starting around year 3 or 4 (perhaps year 5 for you because you are in a better climate) you will still make the commute but your cushion will decrease to about 5-10 miles as the pack naturally degrades.
That 24 miles @70mph is a serious battery drain and will determine your cushion. Going 65 will save you some amount of energy and going 60 will save you a lot. So you can adjust on your way home if you are running low, have to do errands, etc.
As far as climate control your main concern will be winter. First the battery has 10-20% less capacity in 30-40 degree cold. Add to that the heater will sap another 10-20% of your range on the 2011-2012 Leaf. Personally I would go for a 2013 Leaf which has a much better heater and thus heating will have a negligible effect on your range.
All things considered and based on my experience I think the Leaf will be very suitable to make the trip
without the charger at work for most days of the year. You will learn how to best drive the Leaf to get the most out of it and techniques like pre-heating the vehicle in the winter will also help.