You’ve just returned from a farmer’s market with fresh, unwashed eggs and you’re wondering if they should be refrigerated. Or you watched a cooking video where European eggs sat on the table for days and you’re confused as to why American eggs are different. Or you left your eggs on the counter this morning and want to know if they’re still safe. Do eggs need to be refrigerated?
Short answer: In the United States, yes, always. Store-bought American eggs must be refrigerated because the USDA-mandated cleaning process removes the egg’s natural protective coating, called the bloom or cuticle, and refrigeration is essential for safety. European eggs are different in that they are not cleaned and retain their protective coating. If you have unwashed eggs from a local farm, different rules may apply.
To see how perishable foods compare in shelf life, visit our The Complete Guide to Food Storage.
To take the keys
- Eggs purchased in the USA: Always refrigerated. The cleaning process removes the bloom and the cooling business is not done.
- European eggs: do not refrigerate because they keep their natural protective flower. Do not apply European rules to American eggs.
- Unwashed farm or backyard eggs: it can be stored at room temperature for several weeks, provided the blooms are intact and never refrigerated.
- Once in the fridge, always in the fridge. Repeatedly taking eggs in and out of the refrigerator accelerates the risk of bacteria.
- The FDA requires that eggs be kept at 45°F from 36 hours after establishment through the retail chain.
- Leave the eggs in the refrigerator for more than 2 hours it is not recommended. Return to the refrigerator immediately.
Why should American eggs be refrigerated?
The reason Americans refrigerate eggs is not arbitrary. It comes directly from a food safety regulation passed in the 1970s and the exact way that rule removes the egg’s natural protection.
Each egg is laid with a natural protective covering called a flower or cuticle. This thin, moist membrane closes the pores of the egg shell, significantly slowing the entry of bacteria and the loss of moisture. The bloom is what allows the unwashed egg to be safe for a period of time at room temperature.
USDA regulations require that all eggs produced commercially in the United States be washed and cleaned before sale. The cleaning process removes surface contaminants including Salmonella bacteria, but completely removes the bloom. Without blooms to protect the porous shell, bacteria can more easily enter and eggs become more susceptible to spoilage in warm temperatures. Cooling compensates for the lack of bloom by slowing down bacterial growth.
This is a direct trade-off: the US removes surface bacteria through washing and compensates for the need for refrigeration. The entire chain from the farm to the processing plant to your kitchen to cold storage exists because that trade was made.
Why European eggs do not need refrigeration
A different approach to the same problem
Most European countries take an anti-egg safety approach. Egg washing is banned in much of the EU before the eggs reach consumers, as washing opens the pores of the shell and removes the protective cuticle. Instead, European producers focus on preventing Salmonella before it reaches the egg, mainly by vaccinating layers against the bacteria.
In Europe, eggs can be safely stored at room temperature for several weeks if the hens are fully flowered and vaccinated. That’s why you see eggs on unrefrigerated shelves in French supermarkets and Italian grocery stores. The approach is different, not smaller. Research by USDA food technologist Deana Jones, published in the journal Poultry Science, found that refrigerated eggs (regardless of whether they were cleaned or not) kept an A grade for an average of 15 weeks. Unwashed eggs stored at room temperature degraded from grade AA to grade B within one week.
Key point for American consumers: The European approach only works because the flowers are intact. Do not apply European room temperature storage rules to store-bought eggs. They have been cleared. Their bloom is gone. They need a refrigerator.
What about Farmers Market and backyard chicken eggs?
Know what you’re getting
Eggs sold at farmers markets and eggs from backyard chickens are not subject to the same USDA cleaning requirements as commercially produced eggs. Producers with fewer than 3,000 chickens are exempt from federal egg wash regulations, although state laws vary significantly.
If eggs from your farmer’s market are unwashed and never refrigerated, they retain their bloom and can be stored at room temperature for 2 to 3 weeks or in the refrigerator for up to 3 months. The rule of thumb is that if an egg has never been refrigerated, you can store it at room temperature. If at any time an egg has cooled, it must be refrigerated.
Ask your farmer’s market vendor if the eggs have been cleaned and refrigerated. If they’ve been cleaned or you’re not sure, treat them like store-bought eggs and refrigerate them immediately. If you clean the rear eggs yourself, they should be refrigerated after that point.
The Once Cool Always Cool Rule
This is the rule that most people get wrong. When the chilled egg is moved to room temperature, condensation can form on the outside of the shell when warm moist air comes in contact with the cold surface. This condensation, along with the change in temperature, can carry the bacteria through the porous shell. Repeatedly taking eggs in and out of the refrigerator speeds up this process and increases the risk of food safety.
USDA guideline: If chilled egg has been left at room temperature for more than 2 hours, return to refrigerator and use soon. Don’t take eggs out of the refrigerator and freezer more than once over several days. Keep it cold and store it there.
A complete refrigeration guide for every egg situation
| State of the Egg | chill? | How Long Does It Last? |
|---|---|---|
| Raw eggs purchased in the USA | Yes – always | 3 to 5 weeks from purchase |
| Unwashed farm eggs (never refrigerated) | Optional – full bloom | temperature within 2 to 3 weeks; Up to 3 months in the refrigerator |
| Unwashed farm eggs (refrigerated first) | Yes — once cold, stay cold | Up to 3 months in the refrigerator |
| Hard-boiled eggs | Yes, within 2 hours of cooking | 1 week in the fridge |
| Egg dishes (quiche, casseroles, scrambled) | Yes, within 2 hours of cooking | 3 to 4 days in the refrigerator |
based on USDA FoodKeeper directions and FDA Safe Food Handling Guidelines.
Where to store eggs in the refrigerator
Good storage practices
Main shelf towards the back, never the door. The egg tray on most refrigerator doors is one of the most popular and worst places to store eggs. The door is the hottest part of the refrigerator and changes every time you open it. A main shelf towards the back holds the coldest temperature.
See also
Store the eggs in the original carton. The carton protects the eggs from the strong odors of other foods through its porous shell. Raw eggs easily absorb odors from the environment, which can affect the taste. The cardboard protects against cracks and preserves the date of the package.
Shop with the big end. The air cell is at the large end. Keeping it on top reduces the chance of bacteria migrating from the air cell to the yolk.
Keep the refrigerator at or below 40°F. Check the refrigerator temperature regularly. Many refrigerators run hotter than their settings indicate. An inexpensive refrigerator thermometer confirms you’re at a safe temperature.
Do not leave the eggs at room temperature for more than 2 hours. For baking, it is good to bring the eggs to room temperature for 20 to 30 minutes before using. Return unused eggs to the refrigerator immediately.
Recipes that use eggs
Frequently Asked Questions
I left the eggs on the counter to cook for 3 hours. Are they safe yet?
Chances are, if your kitchen was at normal room temperature of about 68 to 72°F and the eggs were refrigerated. Three hours is a little over the 2 hour guideline, but not terrible in a cool kitchen. Return to the refrigerator immediately and use within a week. If your kitchen was warm, above 80°F, or the eggs are near the end of the 3- to 5-week window, be careful and discard them. If you’re cooking for anyone who’s pregnant, elderly, very young, or immunocompromised, skip it just to be safe.
Why don’t European eggs need refrigeration, but American eggs do?
The difference is the cleaning process. US regulations require that commercially produced eggs be washed and disinfected, which removes the egg’s natural protective bloom. Without bloom, the porous shell is vulnerable to bacterial ingress, and refrigeration is necessary. European regulations prohibit washing eggs before sale, preserving the bloom and allowing them to be stored at room temperature. European producers also vaccinate chickens against Salmonella as a major safety measure. Neither system is the best in terms of results, but they require different storage practices. American store bought eggs have been cleaned. They must be cooled.
Can I take the eggs out of the fridge to come to room temperature?
Yes, and it’s actually better for baking. Eggs at room temperature work more smoothly into cakes and create better volume in cakes. Take out only what you need and let it sit for 20 to 30 minutes before using. Return unused eggs to the refrigerator immediately. Do not leave the entire carton on the counter while measuring and mixing; scoop out individual eggs as needed.
Further reading
Better Living may earn commissions through affiliate links and may occasionally feature sponsored or partner content. If you make a purchase through our links, we may receive a small commission at no cost to you.
