By Susan Werner 
For long-term frozen food storage, a common target is 0°F (-18°C), but use the appliance manufacturer’s settings and reliable food-safety guidance for your situation. A freezer thermometer can help verify the cabinet temperature rather than relying only on the control dial.
See our freezer thermometer guide and 0°F freezer temperature guide.
Why 0°F (-18°C) Is a Common Freezer Target
A steady freezer temperature helps keep food frozen and supports predictable storage quality. The control setting itself may not display the actual cabinet temperature, so verify it with an appliance thermometer.
Where to Put a Freezer Thermometer
Follow the thermometer and freezer manufacturer’s instructions. Give the freezer time to stabilize after loading food, changing the control, or opening the door repeatedly before judging the reading.
If the Freezer Is Too Warm
Check that the door closes completely, the gasket is clean, vents are not blocked, and the appliance has the required exterior clearance. Avoid repeatedly turning the control colder without investigating why the temperature is high. See our door-seal guide and air-vent guide.
After a Power Outage
Temperature history matters after an outage. Keep the door closed as much as practical and follow current food-safety guidance when deciding what food can be kept. See our post-outage temperature guide.
Bottom Line
For normal long-term frozen-food storage, 0°F (-18°C) is a common target. Verify actual temperature with a freezer thermometer and use the appliance manual for control settings and troubleshooting.
Understanding the Risks of Extreme Cold
When temperatures fall to freezing or below, the human body’s natural heat regulation can struggle. Chief among the risks at temperatures of 0°F or lower are:
Hypothermia: This occurs when the body loses heat faster than it can produce it, ultimately causing the core body temperature to drop below 95°F. Symptoms include shivering, confusion, slurred speech, and exhaustion.
Frostbite: This condition happens when skin and underlying tissues freeze, commonly affecting toes, fingers, ears, and the nose. Indicators include numbness, tingling, and changes in skin color.
Preparing for the Cold
To safeguard against these dangers, preparation is key:
Layering Clothing: Use multiple layers made of moisture-wicking materials next to the skin, insulating layers like fleece in the middle, and a waterproof outer layer. This method helps trap heat while allowing perspiration to escape.
Proper Footwear: Insulated, waterproof boots are essential, along with thick, moisture-wicking socks. Keep feet dry to prevent frostbite.
Accessorizing Wisely: Wear warm gloves or mittens, scarves, and hats that cover your ears. Approximately 30% of body heat can be lost through the head, so a good hat is essential.
Stay Dry: Wet clothing can quickly lead to hypothermia. Avoid cotton as it retains moisture and opt for water-repellent materials instead.
During Cold Exposure
If you must venture outdoors when temperatures are 0°F or below:
Limit Time Outside: Try to stay in your home as much as possible, especially during extreme cold alerts. If you must go outside, take frequent breaks indoors.
Recognize the Signs of Cold Stress: Be aware of the early warning signs of hypothermia (shivering, fatigue, confusion) and frostbite (numbness, white or grayish skin).
Keep Moving: Engaging in physical activity helps generate body heat. However, avoid over-exertion, which can lead to sweating and subsequent heat loss.
First Aid for Cold-Related Injuries
If you or someone else displays signs of hypothermia or frostbite, immediate action is necessary:
For Hypothermia:
- Call emergency services immediately if severe symptoms occur.
- Move the affected person to a warm environment.
- Remove any wet clothing and wrap them in warm blankets. Provide warm drinks if conscious and alert, but avoid caffeine and alcohol.
For Frostbite:
- Get the person indoors and remove any restricting clothing.
- Never rub the frostbitten area. Gradually warm the affected areas, ideally in warm (not hot) water.
- Seek medical help if blisters develop or the skin becomes dark and hard.
Conclusion
Cold temperatures can be dangerous, but with proper knowledge and preparation, you can significantly reduce your risk of cold-related health issues when the temperature drops to 0°F or lower. Stay equipped, stay informed, and prioritize warmth to safely navigate through the winter months.
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