I was hoping someone would answer this question directly but no one has, so I'll try. Please correct me if I'm wrong. I'm trying to wrap my head around this topic but am working with very limited brainpower.
Piggy's rules: (1) As rh goes up, PMC goes up; (2) as temp goes up, PMC goes down.
Question: Are these rules holding the other variable constant? That is, for example, as temp goes up while holding rh constant, PMC goes down? If so, then the simple answer to poorman's question would be "PMC of the cigars would be higher in the winter."
Assuming I'm right so far (hope so), I'll try an explanation of why this is so. At lower temperatures with rh constant, the maximum amount of water vapor the air will hold is reduced and since the percentage of this maximum that is water vapor in the air is the same (constant rh), there will be less water vapor in the air. But the amount of moisture in the environment hasn't changed, so the moisture that is not water vapor in the air must be somewhere else, namely, the cigars and anything else in the environment that will hold moisture. Piggy says the cigars compete with the air for holding moisture. As temp goes down, rh constant, the air is losing and the cigars are winning.
Do I have it right <cringe>?