Thank you, thank you, thank you!!! There is so much focus on "average". All averages are normal, but normal does not mean "average" by any stretch. Outside of few instances--baseball,e.g.--it tells you very little all by itself.
That's why we look at the ensemble spread so closely--the 'avergage"/"mean' doesn't really tell us too much.
At minimum, I would look at +1/-1 SD as "normal".