They very widely in weight. Some are quite muscular and some are quite thin. Also it's hard to tell until 6 months what their adult weight will be as up until this point (while they are constantly growing) like kids they they usually go through growth spurts still. It will also depend on breeder and blood lines. Australian and European V's are generally bigger. American/Cdn standards are 40-55 for females and 45-60 for males. At 6-7 months they are generally 75% of their adult body weight.
My guy is a week shy of 5 months (approx 21 weeks I think) and already 38lbs. He's grown exactly 2 lbs every week since wee got him. He's not huge in size but built like a brick sh*t house. Who knows if he keeps it up but he's on pace to be 65lbs.
I wouldn't worry about the weight at certain ages, as long as your pup is healthy and eating. Best of luck.
Dexter was 21.5 lbs at 14 weeks but 3 weeks later he was 31.1. Scarlet was 28.7 at 16 weeks. Now, at 26 and 18 months respectively, they both weigh in at about 65 lbs. I'm guessing their parents were big Vs.
How tall are your Vs? Pumpkin is going through a leggy stage right now, and is on the tall side @ 23 1/4" (10m tomorrow). I'm hoping she is going to fill out in the chest a little more. I don't think she'll be 65lbs, but a bit of additional weight would be great. I'm guessing 41-43?? Ironically, her mom was on the petite side. Just never know I guess.