Room temperature is far more conducive to mold growth than the 34 or so degrees in an icebox. But the freezer makes and even better storage climate. I like toast only, so can pop a frozen slice in the toaster with fine results.Actually, here in Vegas if we leave the bread out on the counter in the summer it molds in less than a week. If we leave the bread in the fridge it stays good for almost two weeks. I can't explain it scientifically, I've just seen the results.