Average Height For 15-Year-Old Female: The average height of a 15-year-old girl. I just want to know what people think. I measure 164 cm (6.4)Average makes no sense. Weaver Centers for Disease Control says: Girls with 64 inches or 5 feet and 4 inches are considered normal. To live in the 97th percentile, a 15-year-old girl must be only 170 cm tall. The 59-inch or 4-foot-11-inch girl is 3% taller.