I’ve had my 2012 Chevy volt for two weeks now. I’ve had ranges after a charge vary from 36 miles to 29 miles. The temps are getting colder (averaging around 32 degrees)(I do charge my car in a well insulated garage) I’m wondering what others of you have experienced with your winter range after a charge? Does it drop? How much? What do you average in the summer? Should I be concerned? Thanks for the help.