Being an '11 it may or may not have the cold weather package, probably very much necessary for your climate to have.
Even if it has the CW package the heater is quite poor in teens or below, it uses liquid heated by an electric coil, rather slow to heat and has lots of losses and really sucks the range although I'd still think you'd make your commute. Do you have the option of charging at work? even a 120v plug would help for 8hrs. The reason I mention this isn't so much that you'll really need it but rather for better heat in the winter preheating.
It should probably make your commute(22 miles or 11 miles one way) even in the coldest weather but how comfortable you'll be is another matter. Living in a cooler climate the battery probably shouldn't degrade much further, although no guarantees, try and charge in the cooler part of the day and not in the hot sun, park in the shade if possible.
You didn't say the price but personally for me to look at a '11 it would have to be close to $5k, not that I really see them that low but I believe other markets are starting to see used Leafs around that price point.