If you have a Goldenrod dehumidifier in there you *might* be ok.
Kydex & plastic should be no problem.
Leather *can* be problematic because of its ability to retain moisture and start corrosion on your weapon.
Some people won't even store pistols in a nice new pistol rug (case).
I use pistol rugs whilst storing everything that does not need to be immediately accessible.
I also keep a liberal (dirty word) coating of BF CLP on all my stuff and generally don't put anything away dirty or with fingerprints on it.