The recommended temperature for a freezer to keep food safe is at or below 0°F (-18°C) . However, the ideal temperature for a freezer may vary depending on its environment and other factors. The typical factory setting for a freezer is 0°F (-18°C) . It is important not to set the temperature colder than necessary, as this can cause vegetables to lose their freshness. If the freezer is in a garage or basement, the temperature may need to be adjusted to account for humidity or outside temperatures. It is recommended to keep the freezer around 75-80% full to help retain cold air, but not fully packed as this can block the internal air vents and make it harder to distribute cold air throughout the freezer. It is also important to regularly check the temperature of the freezer to make sure it stays constant and adjust the temperature if necessary.