I have to (respectfully) disagree on this one. Sorry to rain on the parade. If you brought this idea up to me just a few months ago, it'd sound awesome to me. A more realistic, gritty element of danger based on the weather. I mean, people can get sick from being cold, and die from being sick. Wet clothes would really mess you up if you traveled in them for prolonged periods of time. Makes sense. But, I have played a mod like this already, on Skyrim. It's called "Frostfall." You had everything there, from clothes getting damp, danger from traveling in freezing temperatures, dropping temps the further north you went, building fires to stay warm, wearing fur armor to keep your body temp higher, ducking indoors (a tavern, for example) to warm yourself again. This mod is one of the most popular mods of Skyrim, and that says a lot. It's very fleshed out, deeply tested, and extremely detailed. There were even different properties for materials; for example, fur protected you (mostly) from frigid air. But in the rain, fur soaked up water, which was bad news. My friend and I couldn't wait to try it. We installed it. Played. And we hated it. It sucked so bad. At first it was neat seeing condensation on your character's breath, or snow in the fur we wore. Soon though, no longer could we actually think solely about playing the game. The weather itself became the biggest threat to our character. The idea of that might sound cool, but damn, I assure you it's not. We couldn't travel from one landmark to the next without having to pitch a damned tent and make a fire. You couldn't just enjoy the game without constantly worrying in the back of your mind, "Okay, when am I gonna get cold again?" In DayZ, we already have to worry about eating and drinking constantly, which in my opinion is a bit obnoxious, anyway. I know, trust me, I know it sounds awesome, having to worry about weather, cold and sickness. At first glance, it'd add so much to the experience. But keyword there is worry about the weather. Or sickness. The more you're worrying, rather than having fun, even in a realistic game, the harder it becomes to enjoy. Believe me, we're all gonna be searching like mad for pills and stuff to counteract sickness just as much as we need canned beans. In my humble opinion, it'd just add more stress to the experience, and I personally want the opposite.