Yes. That is tall for 13, but if both parents are tall then it is probably not that unusual. A couple ways to determine if unusual would be to compare him to same-age peers (classmates/friends), or compare him to the father's height at age 13.
It is certainly not unusual.
5 foot 2 inch.
11 years old in 2008
He is 6 years old.
his son is 26 years old.
The son is 15 years old.
Cleopatra wsas 22 years old when she had her first son.
His Son is almost 2 years old
there is nothing unusual about that.
Kid Rock's son is 14 years old
He does not have a son, he has a daughter that is 8 years old.
If the father is 60 years old and the son is half his age, the son is currently 30 years old. When the father was four times the son's age, he would have been 40 years old (since 40 is four times 10). At that time, the son was 10 years old. Thus, the boy was 10 years old when his father was four times his age.