What should be the average weight of a 6 year old girl?

About 44 lbs...: Using the cdc female growth chart guidelines which the most current posted data is from 2000, a 6 year old female can range from 36 lbs (5% percentile) to about 58 lbs (95% percentile) and still be considered normal. If you wish to use 50% percentile to consider average then that would be about 44 lbs, the growth charts can be found with a google search for cdc growth charts.

Weight: Weight varies considerably with height and body type. Are you concerned about being overweight or underweight? It is important not to place undue pressure on a child because of weight etc. At this young age. Discuss this with her doctor at her next check up. Meanwhile be sure she is on a healthy lifestyle and healthy diet and playing for exercise as much as possible.