Is it normal to weigh 90 lbs at 13?

Oh no,no,no!An average 12 year old is about 99-108 pounds so that is too skinny.But it also depends on condition and gender to be acurate.A normal 13 year old girl should be around 110 but a little more or less is fine.A boy would weight a bit more.But what ever you do,don't go over 117.Hope this helps.Im 12 and is 110 because I'll get my braces and will lose weight after.