What is the average weight a 15 can bench press?

Im 13 5.5 and 112lbs and I bench press at around 140-150lbs that's a bit better than a 14 year old that does Weightlifting so you should be able to bench press at least 3/4 of your own weight.

my records.

deadlift: 250lbs-280lbs

benchpress: 140-150lbs

squat: 190-200lbs