I don't know about the humidity thing. Houston is humid and I've never had a problem getting to temp even right after it's rained. I keep charcoal in my garage, in a shed and a bag in my Performer. No problems. Every smoker has it's own "sweet spot", learning curve so cook more and get to know it. Hell I put my WSM out of round by being a little rough with it, now I have to rotate the body to find where it all seals up.