Discover the Optimal Fridge Temperature, According to Experts!

I determine the fridge’s temperature by the taste of the milk—it should be cool, not lukewarm, and definitely not partially frozen. Clearly, there are more accurate methods for checking refrigerator temperatures. According to experts I consulted, maintaining an ideal temperature is crucial for the freshness and safety of your food.

“Maintaining the correct temperature in your refrigerator is key to preventing spoilage and foodborne diseases by inhibiting bacterial growth,” explains Gabriela Swamy, PhD, a professor at San Jose State University and a member of the Institute of Food Technologists Refrigerated & Frozen Foods Division. “It also preserves the food’s texture, taste, and overall quality, which minimizes waste and extends the shelf life of your groceries.”

Swamy recommends keeping the refrigerator temperature below 40°F to optimize food quality and inhibit bacterial growth, while avoiding temperatures close to freezing, which is 32°F. The freezer should be set at 0°F.

“These temperature settings slow down spoilage, decrease the risk of foodborne illnesses, and maintain food quality and longevity,” Swamy states. “It’s essential to use a thermometer to ensure these settings are accurate.”

Finding the Perfect Balance in Refrigerator Temperatures

You don’t want your refrigerator too hot or too cold—aim for just right, like Goldilocks. “If a refrigerator becomes too cold and starts freezing food, it will draw out moisture, causing ice crystals,” explains Michael Handal, a chef at the Institute of Culinary Education in New York City. “This process can rupture cell structures, leading to freezer burn and a decline in the food’s overall quality.” This is especially true for fresh produce and dairy products.

Conversely, if the fridge is too warm, it becomes a breeding ground for bacteria, increasing the likelihood of spoilage and foodborne illnesses. “The goal is to keep your food sufficiently cool without freezing it,” Handal adds.

There are times, however, when it might be advisable to lower your fridge’s temperature settings. According to Swamy, such instances include hot weather, storing large quantities of food, or keeping items that spoil easily, such as seafood or dairy. “Lowering the temperature can also be beneficial following a power outage or if items seem to be spoiling prematurely to ensure food remains safe and fresh,” she notes.

Another reason to adjust the temperature could be when preparing for a major event, such as Thanksgiving. “For example, if you’re storing a large, 18-pound turkey, a cooler refrigerator setting helps keep the bird safely cold until you’re ready to cook it,” Handal explains.

Identifying Hot and Cold Zones in Your Fridge, According to Experts

Be strategic about where you place items in your fridge. The coldest areas are typically towards the back and on the lower shelves because cold air sinks and there’s less air flow. “Store your meats, dairy, and perishable leftovers in these colder spots to keep them fresher for longer,” advises Swamy. “However, avoid placing sensitive produce in these areas as they might freeze or spoil more quickly.”

The warmest areas are the door shelves and the upper sections of the fridge. These areas are prone to temperature fluctuations, especially when the door is frequently opened. “These spots are best for storing less perishable items like condiments, butter, soft drinks, and pasteurized juices,” Swamy explains. “It’s best to avoid storing dairy, eggs, or raw meats in these areas to prevent spoilage and reduce the risk of foodborne illnesses.”

Is a Refrigerator Thermometer Necessary?

The built-in thermometer of a fridge might not always provide accurate readings, mainly due to its placement. Swamy recommends purchasing an independent thermometer and positioning it in the center of the refrigerator, away from any walls or vents.

“Regularly checking your refrigerator’s temperature with a separate thermometer is a prudent measure,” says Handal. “By moving the thermometer around and checking different sections, you can adjust as needed, ensuring that your food is kept at safe, optimal temperatures.”