What is the average weight for a 5ft 2in girl?
Probably 115 to 130 pounds at age 18.
Average Teenager Weight
http://lifestyle.iloveindia.com/lounge/average-teenager-weight-236.html
Go to the site below to check your bmi to get an idea where you stand. bmi calculator:
http://www.bmi-calculator.net/
about 115-130 pounds.