The 'range' is a guestimate the car makes based on a bunch of factors, of which some include outside temp, past 'driving style', recent trips, etc. If you consider all the variables that seem to impact consumption, that range guessometer at parking is kinda worthless. I mean if all I have done for the past month is to putter around town in warm, sunny weather, but then decide to take a road trip during a snowstorm, the car will have no idea how to predict the range until I start driving.
For my car, every morning it optimistically believes it will get to drive 180+ miles because it is sitting in a 65 F garage. Within a minute of 2 of driving and it realizes it is 10 F out, not 65 F out, it subtracts about 30-40 miles from my range...