To maintain food safety, refrigerators should be kept at or below 40 F and freezers should be 0 F. One of the most basic ways to ensure food safety in your kitchen is to set your refrigerator and freezer to safe temperatures for food storage. According to the Food and Drug Administration, your fridge should be set at or below 40 F (4 C). Your freezer should be set at 0 F (-18 C). Food stored in the freezer at 0 F will remain safe indefinitely, although the quality will decrease the longer the food is in the freezer. Freezing does not change a food's nutritional value.