sketcha - I can't tell you how cold for storage, have no clue, but I can tell you how cold for smoking them. In my old Igloo I hade to go outside to smoke. Anything below 12F/-10c, the smoke just doesn't burn right, tastes harsh. Some times I'll brave -20, but can only get down 1/3rd. New Igloo has a garage, so even if it gets to -48 like last winter, no problem. I love Summer.