They should weigh 100-130lbs if they are 5 feet-5 foot 8.
There is no specific weight for a 13-year-old girl (or a person of any age). Weight is related to height and body composition rather than age. For more information about weight in relation to height, and to see charts showing the distribution of weights and heights of children at various stages, please see the page link, further down this page, listed under Related Questions. Alternatively, please feel free to ask the question again and include more detail.
I'm 13 year old girl and I weigh 150 I'm 5,5 am I over weight
Based on BMI calculation, a 5'5 person at 150 lbs has a BMI of
25.0, which is borderline overweight. Losing just a few pounds
(5-10) will put you safely in the normal weight category. I hope
It depends on your height. Here below is a link you can go to to check your bmi. (body mass index.) It can tell you if you're normal, under, or overweight. http://pediatrics.about.com/cs/usefultools/l/bl_bmi_calc.htm