[grecy]

I live in the Yukon and we regularly have -40C/F for a few weeks a year, and a solid 3 months where it doesn't get above -30C, and hovers into the -40s at night.

My friend here has a 2011 Toyota Highlander Hybird, and she barely notices a difference in range year-round.

[gridspy]

Hybrids do not store energy for the journey in the batteries, they store it in the fuel.

The storage capacity of the fuel is not affected (much) by temperature.

From a simple perspective, the batteries in a hybrid just serve to smooth out the energy demand and provide regenerative braking.