When I open a tin and have a first smoke out of it, I assess the humidity of the contents and determine if I'd like to keep it as-is or let it dry some. If it's good to go, it gets dumped straight into a canning jar. Otherwise, I let it sit in the tin to gradually lose some of the moisture, checking it occasionally to see if it's jar-ready.
I've found that tobaccos with more additives (aromatics) can be left in the tins, and they will take a long while to dry out, if they dry out at all. Tobaccos without all of the added sugar and humectants will lose moisture pretty rapidly.
As others have said, it also depends on the humidity in your locale. I recently moved from a typically dry area to a very humid area, and I'm having to adapt and adjust my methods accordingly. Since I prefer my tobacco on the dry side, I might have to employ an alternative means of drying.