I know this is an older thread but I just did my last harvest for a few years being I'm leaving tomorrow on the road for a long work trip and weighed bud in day 2 of cure and again just now in day 15 before I pack it and move it.
It had 1% total weight loss on 623 grams using glass mason jars burping every 12 hours the first 72 then every 24 for 3 more days then every other day. Day 2 weight was 623, today day 15 it weights 616, about 1% loss. 5-15%, even 5-10% is absolute nonsense. Over 90% of moisture loss in cure is from the stems, not the bud or leaves. I would think some of the experts on here would know this. I also only dried for 5 days at 68 temp with 45% RH in dark room individual buds hanging. The stems did not snap, I only dry until I get a pre-snap feel which is hard to explain but my stems bend, not break before they go into cure. So this makes the claims of 5-15% even more ridiculous being most dry until stem breaks, I'm assuming.
Has anyone who commented here actually even weighted their bud after dry and then again 2-4 weeks later in cure? Doesn't sound like it. Come on peeps. Keep it real and keep it honest. No information is better then bad information.
See you in 2 years being I can't delete my account!
I start putting my weed into jars and curing around 65%-70% RH.
Last time I did a weight test the buds lost about 9% of the weight from 68% RH to 58% (when I stored them).
I'm not sure why you don't mention at what RH level you started measuring and what the level you brought the weed to was.
Your test isn't really of much use without those numbers.
Also you've only counted 15 days of curing and without the RH levels which you fail to mention there's no way of knowing what RH levels you're talking about relative to the weight.
The OP asked for 2 months, the test I did was 1 month and more importantly from 68% RH to 58%, which is quite a huge difference in moisture levels and water retention.
A friend of mine who did the same experiment as me lost 15% of the weight of the weed, after a dry to 70% RH with bendy stems and then a 1 month cure.
That's why I estimated 5-15% depending on variables.
I still stand by that number.