The ideal temperature for a freezer is at or below 0°F (-18°C) . This temperature ensures that food stays frozen and safe for long-term storage. However, the temperature may need to be adjusted by a few degrees depending on the freezers environment and other factors. It is important not to set the temperature colder than necessary, as this can cause vegetables to lose their freshness. It is recommended to place an appliance thermometer in the freezer to make sure the temperature stays constant and to check it regularly. If the power goes out, it is important to keep the freezer door closed as much as possible to maintain the temperature. A freezer can keep food at a safe temperature for around 48 hours if the door remains closed.

In summary, the recommended temperature for a freezer is at or below 0°F (-18°C), but it may need to be adjusted depending on the freezers environment and other factors. It is important not to set the temperature colder than necessary, and to place an appliance thermometer in the freezer to monitor the temperature.