Hmm, would the cold weather really make that much difference?

I mean, if you leave it out for 48 hours then sure, but if you just take it out of the humidor and light it up right away, the FIRE inside the cigar is going to be a much bigger factor than the weather outside.

I've seen many humidors set at a much higher RH than I prefer, but I think it has to do with the fact that the doors to the commercial humidor are being opened all day long.