* Gender: Boys generally weigh more than girls at this age.
* Genetics: Family history plays a role in a child's size and weight.
* Nutrition: A child's diet heavily influences their weight.
* Activity level: Active children may be leaner than less active children.
* Health: Underlying health conditions can affect weight.
While you won't find a precise average, you'll find ranges in growth charts provided by organizations like the CDC (Centers for Disease Control and Prevention) or WHO (World Health Organization). These charts show weight percentiles, indicating where a child's weight falls compared to other children of the same age and sex. Looking at these charts is a far more informative and accurate approach than trying to find a single "average" weight.