Does cold weather hurt a Prius’ mileage? Yes, according to Minnesotan, Michael Wurzer.
He ONLY got 29 MPG on a recent trip at -13F.
All cars get worse mileage when it’s cold. Duh.
How does that compare to your car’s mileage at -13F? Does your car even start at that temperature?
So, yes, the Prius gets worse mileage in the cold, bringing it down to the mileage of a typical high-mileage car on a summer day.