4 degrees may or may not be normal depending on where you drive but a 14 degrees difference seems wrong. Maybe something is wrong with the temperature sensor? Last time I've heard of this was with the 8th gen civic.
At least you Civic will have more things going right with it than the CaddyMine was 6° off versus my phone, and tablet and my neighbors car parked beside me. We were chatting before leaving for work. He has a Caddy.