Here's the short answer: 5 degrees Celsius (41 Fahrenheit) or under. Nasty bacteria thrive at between 8 degrees and 63 degrees, known as the 'danger zone'. This is why the Food Standards Agency recommends keeping your fridge under 5 degrees to be safe.
So what temperature is the right temperature? The Food Standards Agency advises household fridges to be set at 5 degrees Celsius or below. This is because harmful bacteria grow best in what is known as the 'danger zone' between 8 degrees and 63 degrees.
'For most fridges, a mid-range setting—such as 3 or 4 on a scale of 1-5, or 4 or 5 on a scale of 1-9—typically maintains a temperature within the recommended range of 3-5 degrees. ' 'This balance ensures both energy efficiency and food safety, preventing food from spoiling or freezing.
It is recommended to keep your freezer at 0°F (-18°C). A too-cold freezer might not negatively affect your food, but it could raise your electricity bill. Lower temperatures matter most when you're adding new food, since fast freezing helps reduce texture and taste changes.
If it's not plugged in and trying to cool. Most manufacturers do not suggest operating a refrigerator in temperatures colder than 55 degrees F or hotter than about 90-95 F degrees.
As aforementioned, the recommended optimal temperature for a fridge is 3°C to 5°C. To check the temperature inside your fridge, place a thermometer inside a glass of water and leave this in the middle shelf for 12 hours or overnight.
Refrigerators do not work as well in the cold as they were designed to work at room temperature. Most of the time, the freezer stops working before the fridge section does. One of the primary culprits behind a malfunctioning garage fridge in winter is the extreme cold temperatures that characterize the season.
According to the United States Department of Agriculture (USDA), the ideal temperature for a freezer is 0 degrees Fahrenheit (-18 degrees Celsius) or below. This ensures any bacteria present in the food will not grow and multiply, keeping the food safe to eat for longer periods of time.
Fridge temperature settings are generally numbered from 1 to 5, with 5 being the coldest. A fully stocked fridge may need to be set to a higher setting (around 3 or 4), whereas one with more space is best suited to temperature setting 2 or 3.
You can always err on the safe side and lower the temperature below 0°F—your freezer can never be too cold. “Most recommendations are for a range of temperatures but in reality, there is no temperature that is too low for freezers,” says Tetro. “Most freezers do have a lower limit of around -10°F (-23°C).”
The Australian Standard for fridges uses a fresh food compartment average temperature of 3°C. It's a good target to aim for because it means not freezing foods yet still keeping them below 4°C. If you're experiencing temperature fluctuations, read our guide to troubleshooting a fridge.
The ideal fridge temperature is between 0°C and 5°C.
Some fridges don't even offer you the ability to go over 5 degrees!
The Department of Agriculture states bacteria multiply quickly in the "Danger Zone," which is temperatures beginning at 40°F (4.5°C). It's best to set your temperature gauge a few degrees below that. Most experts recommend that the ideal temperature setting for a refrigerator is between 35-38°F (1.6-3.3°C).
Mar 4, 2024. Knowledge
Refrigerators should be set to maintain a temperature of 40 °F (4.4 °C) or below.
The "Danger Zone" (40 °F-140 °F)
This range of temperatures is often called the "Danger Zone." That's why the Meat and Poultry Hotline advises consumers to never leave food out of refrigeration over 2 hours. If the temperature is above 90 °F, food should not be left out more than 1 hour.
Based on these two factors here's the number your fridge should be set on: If you're always storing plenty of food you need the colder settings (3 to 4). If you're not storing as much choose between 2 and 3. If the temperature is very low, ice will form and it may prevent air circulation.
Turn the dial to the 2 or 3 setting for everyday refrigeration use. Note: We recommend the average temperature inside the fridge to be around 3°C to 5°C and the freezer temperature to be around -18°C.
If it's set too cold, set it higher and give it a day to adjust. Be sure to only adjust the temperature in relatively low increments, checking with a thermometer every 24 hours.
When working properly, the refrigerator temperature should be 40° F (4.4 °C) or below; the freezer, 0° F (-17.8 °C) or lower. After the power comes back on, if you're not sure a particular food is cold enough, take its temperature with a food thermometer.
Aim to stay between 35° and 38°F (or 1.7 to 3.3°C). This temperature range is as close as you can get to freezing without being so cold that your food will freeze. It's also as close as the refrigerator temperature should get to the 40°F threshold, at which point bacteria begin multiplying rapidly.
When the temperature is negative, i.e. below 0 °C, then we know that it is so cold that water will freeze. Water will always be ice below 0 °C, liquid from 1 to 99 °C, and steam from 100 °C upwards.
If it's too cold, things will start freezing. So what temperature should a fridge be? Here's the short answer: 5 degrees Celsius (41 Fahrenheit) or under. Nasty bacteria thrive at between 8 degrees and 63 degrees, known as the 'danger zone'.
Chilling foods to proper temperatures is one of the best ways to slow the growth of these bacteria. To ensure that your refrigerator is doing its job, it's important to keep its temperature at 40 °F or below; the freezer should be at 0 °F.
If ambient air temperature drops below about 40 degrees Fahrenheit, the thermostat on the refrigerator may not run its cooling and defrost cycles for the appropriate amount of time.