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The ideal freezer temperature is 0 Fahrenheit (-18 Celsius) for storing food. And -10 Fahrenheit (-23 Celsius) is recommended when freezing food. The faster food freezes the smaller the ice crystals.The smaller the ice crystals the smaller the change in texture and better quality when thawed.f you want to test your freezer to see what temperature it is use a freezer thermometer. Ideally read the thermometer after the freezer door has been closed for quite awhile, like first thing in the morning, so you get an accurate reading.
Quick Answer. A freezer should be set to 0 degrees Fahrenheit or lower. Two to three pounds of food per cubic foot is the maximum density of produce that should be stored in a freezer so that the food can freeze within 24 hours. Any longer than this time and food will reduce in quality.