What is the average weight of a 5' 3 16-year-old girl?

According to your height of 5' 3" your ideal healthy weight is 126 pounds. Your recommended weight range is between 112 and 140 pounds. Remember that everyone is different. You may be fine weighing 140 if you have large bone structure. Do not try to weight less than your body wants to weigh. You will be fighting a loosing battle.