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Between 5'0" and 5'6", depending on genetics. Other factors like diet, fitness, and overall health may also play a role.

This is also the same average height for 13 year old girls, as girls grow faster than boys (thus, may be taller earlier on), but also stop growing earlier too, and don't grow as much.

The average weight for a 13 year old boy will be between 80 and 130 pounds.

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11y ago

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