Unless you're driving inside as well, the ambient temp is going to be a part of it. Anything below 16C will use more energy than above.
The car may start at say, 20C, but driving outside it will cool off to ambient. And is it parked in a heated garage at work? If not, the drive home will use more energy.
See post below:
14 is just under the battery heat threshold, so no surprise.
3-10 will be using a lot of battery heat (plus probably some cabin heat?), so again, no surprise
And on top of that, did you top up the tires?
I already gave mine a good top up since summer and they're a little low on those single digit mornings. Need to do another.
You got your car at peak range season, so unfortunately, the largest shock is yet to come.
I bought mine in late winter/early spring, so I knew what a healthy middle point was, then experienced the high, and the low.
