What Is Proper Refrigerator Temperature?

Aim for 37°F, then check the actual temperature

If you're looking at a dial or a temperature setting and wondering whether your groceries are cold enough, we'd check an appliance thermometer first. Few refrigerator controls show the actual temperature, so a measured reading gives you a better basis for deciding whether the setting needs to change.

The useful distinction is between the number you select and the temperature your food is stored at. About 37°F is the target, while the FDA's 40°F-or-below guidance is the upper storage limit. Keeping those two jobs separate helps you choose a setting and then check whether it's doing what you need.

What the temperature range means

Whirlpool describes 33–40°F (0–4°C) as generally accepted for most purposes, with about 37°F as ideal. KitchenAid gives the same general range and target. Below 33°F, foods may freeze; above 40°F, food spoilage becomes a concern, so turning the refrigerator as cold as possible isn't the goal.

There's a small but useful difference in the upper-limit wording. The FDA says to keep your refrigerator at 40°F or below, while KitchenAid's temperature advice (opens in a new tab) says below 40°F and ideally around 37°F. A target near 37°F fits both recommendations without making the upper boundary your everyday goal.

If you're asking whether 40°F is cold enough, it meets the FDA's stated ceiling. It sits at the warm end of the manufacturers' range, though. A reading below 33°F raises the opposite concern: your fresh food may start freezing even though you've kept it below the food-safety ceiling.

Use a thermometer for each compartment

Put a freestanding appliance thermometer in the refrigerator so you can read the compartment temperature. The FDA's thermometer guidance (opens in a new tab) recommends checking it often, because few refrigerator controls display actual temperatures. That applies whether your control has temperature degrees or a numbered scale.

Look for readings that stay consistently at 40°F or below. The point of checking often is to monitor the storage temperature over time, including after you've adjusted the refrigerator. Use those readings to decide whether another change is needed.

For the freezer, use 0°F as the companion target and a separate appliance thermometer to check it. The FDA's verification guidance calls for freezer readings consistently at 0°F or below. Checking each compartment with its own thermometer gives you a reading for each storage space.

Your dial numbers need their own instructions

Start with the setting recommended in your refrigerator's manual. Controls can be inside along the sides, at the top center, or on the edge of the door. Finding the correct control and its instructions comes before changing anything.

Some refrigerators let you select degrees; others use numbers representing general temperature ranges. Depending on the refrigerator, adjustment may involve arrow buttons or a dial. Follow your own manual's directions for making it warmer or colder, especially when the numbers aren't marked as temperatures.

A numbered setting serves a different purpose from a thermometer reading: it selects a cooling range. Use the manual to choose that setting and the thermometer to see the resulting temperature. Whirlpool's adjustment guidance (opens in a new tab) makes the control method specific to the refrigerator, so keep your model's instructions beside you while you adjust it.

Allow a full day between changes

Make only a small adjustment, then give the refrigerator time to respond. Whirlpool says to check after about 24 hours and, more specifically, to allow at least 24 hours between changes. Use that full interval before deciding on another adjustment, then read the appliance thermometer again.

Your refrigerator's surroundings can affect the setting it needs. Humidity and outside temperatures matter, particularly for a refrigerator in a garage or basement. A setting that needs adjustment in that environment should still be changed in small increments, with the same settling time.

The Whirlpool refrigerator example

For a Whirlpool refrigerator, the typical factory setting is the recommended 37°F (3°C). That's a useful starting point when you're checking how yours is set. Whirlpool's temperature recommendation (opens in a new tab) also says the setting may need to be higher or lower depending on the refrigerator's environment and other factors.

Keep the word “typical” in mind when using this example. Your refrigerator's manual supplies the recommended starting setting and the applicable controls. The factory recommendation gives you a target to work from, while the appliance thermometer lets you verify the storage temperature in your own refrigerator.

Give cold air room to move

Leave the air vents unobstructed and give cold air room to circulate around your food. Whirlpool recommends keeping the refrigerator fully stocked, but that advice belongs alongside the FDA's warning against overpacking (opens in a new tab). A stocked refrigerator still needs open airflow paths between its contents.

KitchenAid likewise advises against overcrowding shelves because airflow helps maintain freshness. When you're putting groceries away, check that packages haven't crowded the vents or filled the space needed for circulation. Those visible checks support the temperature setting you've chosen.

Keep trips into the refrigerator brief so it stays cool. KitchenAid also recommends minimizing how often you open and close the doors. Get what you need and close the door instead of leaving it open while you decide.

What to watch for in your food

Look for ice forming on fresh food as a supplementary check. Whirlpool identifies a setting that's too low as one possible explanation. It also notes that, in an emptier refrigerator, cold air can sink toward the bottom instead of being absorbed by items throughout the compartment.

Comfortably cold juice and milk, food without ice, and fresh food that doesn't spoil early are useful everyday observations in Whirlpool's guidance. Keep the thermometer as your temperature check alongside those observations: the measurable outcome is a consistently cold compartment within the storage limit.

Keep food safety separate from drink preference

A refrigerator at 45°F is too warm for ordinary perishable-food storage. Dairy, eggs, meat and produce may naturally contain foodborne germs, and temperatures above 40°F can be harmful for storing them. Whirlpool's food-storage guidance (opens in a new tab) describes greater temperature flexibility only for a refrigerator used strictly for soda and wine.

That beverage-only exception applies to what you're storing, not simply to calling the appliance a drinks fridge. If it holds milk or other perishable foods too, use the perishable-food temperature limit.

Correct cooling helps food stay fresh and helps prevent bacterial growth, but refrigerated foods still have limits on how long they can be safely stored. Keep storage time in mind even when the thermometer reads correctly, and refrigerate leftovers within two hours.