I'm lost here. Is this thread for real or what? I mean, I can see that the replies on this page clearly aren't, but I don't actually see the original question being serious at all: Surely no-one actually expects that temperature indicator to be 100% correct to the outside temp? I have no idea where the sensor is, but given that on every other vehicle I've been in they will all report different outside temps regardless of what the weatherman says I fail to see what the problem is?
It's just a guide, and a pointless one at that. Stick your head out of the window and find out what the temperature is, don't rely on a bloody gauge in a car!