How accurate are 30+ scans to predict baby's weight?

[aclxxx]

I had my 31 week scan today. All is well which I am grateful. However the lovely sonographer said baby's weight is average. Me: good, what is the weight of baby? Sonographer: nearly 4lb.
Ouch, I have 9 weeks to go, I then asked the estimated delivery weight, I am told 8-9lb .

I am hoping for some encouraging experiences or any tips!

This is DC2, first DC arrived via CS due to breech presentation. I have been given option for CS but have not decided.. I do want to try VBAC. But thinking of the weight is bringing tear to my eyes!

Thank you in advance for reading

Extremely accurate in my opinion. At 34+4 my twins wew estimated to be 5lb4 & 5lb8. They were born the next day at those exacts weights! My sister's baby was estimated at 6lb and was 6lb1 at 35 weeks.

I was scanned at 38+5 prior to being induced and the baby was predicted to be 10lbs 4ozs. He was born two days later at 8lbs 10oz...

I had growth scans every two weeks from 28 weeks (i have type 1 diabetes). They told me every single time that ds was going to be a huge baby, and was measuring above the 90th centile. The last scan was at 36 weeks when they told me he was around 8lb 8 oz. Ds was born a week later weighing 7lb 5oz!