I live in Edmonton, Alberta. I purchased a 2015 Volt a little over a year ago. All last summer, I was pleased with my new 2015 Volt full-charge klm READING, before driving, and the following electric driving distance, usually 73kms; and it never decreased from beginning of summer to end of summer. Last winter it never decreased from beg of winter to end of winter--a reading of 53kms (both readings would vary 1 or 2 kms from day to day. HOWEVER, as soon as cold hit THIS winter, it read/reads, before driving, 42kms. It surely can't be blamed on my driving or climate controls; as I drive as if there is a egg under my accelerator foot and as little a/c or heat as possible. That is a 42.5% decrease from one winter to the next. That is not acceptable. I have had it into my dealer and they, of course, say it tests out ok.