A temperature near 40 degrees is recommended for most food storage. For me, this is nearly impossible, but if you rotate your food storage properly, temperature will not be too much of a problem. Just keep in mind, the cooler, the better. Moisture Moisture can quickly ruin your food storage. Moisture within grains and seeds will cause mold to grow.
Mold can be deadly.
Canned foods can pick up moisture if placed directly on a concrete floor. It is recommended that canned foods be stored on shelves or pallets up off the concrete. In moist climates, rusting cans can also be a problem. When I lived in a moist climate, I noticed rust on some of my storage cans within a year and a half. If you are planning to store your food for a longer period of time, you can coat your metal cans with a thin layer of paraffin wax.