Hello and welcome to the SMF family. Glad you found us. Not sure from your post, but it sounds like your askin' about outside air temps and how they affect your cooking temps? If so, that all depends on your rig. Every smoker reacts differently to varying weather conditions. Its all in playin' with it enough to figure out its characteristics. Once you know how it holds its temps, how it fluctuates due to weather, etc., then you'll know what mods are needed. I don't use a MES myself, but there are many here who do. Be sure to check out the electric smoker threads, and you'll finds lots of help. Good Luck and happy smokin'!