60s F 55-62% RH
at varying stages there may be more sophistication... as far as a few degrees colder or warmer here or there?? but that is probably more a best-guess than anything certain regardless of the confidence soemone has.
Cannatrol has a great device you should reference or mimic, if possible... i've heard the weed that comes out of those is amazing. But again... when dealing with anecdotal evidence, should be skeptical.
In general you are trying to evaporate the water while preserving as much THC/THCA and terpense as possible. At least 1 or more potential terpenes generally produced by marijuana has a low boiling point. You can look these up with google to see which it is. i don't recall.
A boiling point is not a line drawn in the sand when it comes to evaporations... evaporation happens at all times even when the atmosphere is at it's carrying capacity.. it's merely at equilibrium at certain points where as much is evaporating as condensing, it just may not be anywhere nearby. This is why ice cubes get smaller in freezer over time... that is technically called "sublimation" when water evaporates from a solid directly to a gas, but same exact forces at play.
So, a lower boiling points means it'll more likely float off as a gas and at a faster rate at a lower temp than other terpenes. Even though we are well-below boiling points, a few degrees cooler CAN help... how much? i'm sure we can research that if it isn't known. diminishing returns likely or some other arising probelm if too extreme, i'd assume...
in the end, more reseaerch needed. we have the means to isolate all teh relevant compounts and measure their mass. using multiple samples and averaging them will give a very clear idea of what process prserves the most terpenes and THC/THCA and whaveter else we find to be relevant in future as yet not understood.
RH and Temp are both factors to the rate at which something dries or evaporates -- the water and the terpenes in this context. The 55-62% range avoids a more dangerouse range above that will promote microbial growth while still slowing down the evaporation process.
A slow process also allows a more thorough breakdown of various molecules that either improve smoothness or contribute to preferred taste.
Light is the factor that most quicly breaks down THC/THCA. Keep it dark. If you smoke it within a month or 2, probably won't notice either way... you smoke it 1 or 2 years later, you'll appreciate it if you kept it cold and dark... and avoided anaerobic bacterial growth -- burp it.. o2 needs to be refresshed to keep the anaerobes at bay. you know they have taken ahold when things turn brown and taste more like schwag weed than good weed.