What should a 5 foot 2 inch boy weigh?

Around 100 lb: This varies with age some with a range of 88-110 lb as common.You can download a growth chart at the cdc website and follow this over time.See www.Cdc.Gov/growthcharts and select the proper age range and gender.Expected weight will correspond to the percentile the person is at for age. Example: the expected weight of a kid whose height is on the 75% would also be at the 75% for weight at that age.