This question comes up this time each year when the weather turns cold. There are a lot of threads about it priorly but the one below from the Hybrid Camry forum is the most recent.


http://www.greenhybrid.com/discuss/a...ase.10694.html

If its very cold, and your trips are short and it's rainy/snowy/icy and it windy any vehicle could lose up to 60% of it's 'normal' fuel economy. A Prius could be in the mid 20's while a 4c Camry in the low teens. Nonetheless you will still gain 40% in fuel economy over a similar ICE type vehicle even at the reduced FE values