An egg can sit at room temperature for up to two hours before it needs to be refrigerated or thrown out. That two-hour limit applies to eggs still in the shell. Once an egg is cracked open, the raw egg white and yolk should not be left out for more than two hours either. In hot weather, above 90°F, that window shrinks to one hour.
Those numbers come from the same food safety rule that applies to most perishable foods. Eggs are not special in this regard, even though people often treat them as if they are.
How Long Can An Egg Be Out Of The Fridge?
Two hours is the standard answer for shell eggs at normal room temperature. The clock starts when the egg leaves refrigeration, not when you decide to cook it.
Eggs sold in the United States are typically washed before packaging. That washing removes a thin natural coating called the bloom, which normally helps seal the shell. Because that coating is gone, US eggs depend on refrigeration to stay safe and fresh. This is why American grocery stores keep eggs in the refrigerated section, while some other countries store them on ordinary shelves.
Temperature matters more than most people realize. A cold egg moved to a warm counter will sweat. That moisture on the shell can help bacteria move across the surface. It does not mean the egg is instantly contaminated, but it does mean the shell is no longer a clean barrier.
If the egg has been out for two hours or less, put it back in the fridge. If it has been out longer, the safest choice is to discard it.
Why Is Two Hours The Limit?
Bacteria multiply fastest in the range between 40°F and 140°F. Food safety agencies call this the temperature danger zone. At room temperature, bacteria on or in food can double in number roughly every 20 minutes.
Eggs can carry Salmonella bacteria, either on the shell or inside the egg before the shell forms. Refrigeration slows bacterial growth. Warmth speeds it up. The two-hour rule is not about how the egg looks or smells. It is about how much bacteria may have multiplied while the egg sat out.
This is the part people get wrong. A contaminated egg can look, smell, and taste completely normal. You cannot detect Salmonella by appearance. The two-hour rule exists because your senses will not warn you.
Does The Two-Hour Rule Change In Hot Weather?
Yes. When the air temperature is above 90°F, the safe window drops to one hour.
This matters for picnics, backyard barbecues, and cars in summer. An egg salad sandwich sitting on a sunny table in July is not on the same clock as one sitting on a counter in a 68°F kitchen. The warmer the environment, the faster bacteria multiply, and the shorter the safe window becomes.
If you are unsure how long food has been out and the temperature was high, throw it out. The cost of an egg is not worth the risk of foodborne illness.
What About Cracked Or Raw Eggs?
A cracked shell changes the calculation. Once the shell is broken, bacteria on the outside can reach the inside. A cracked egg should be cooked and eaten right away, not stored.
Raw egg whites and yolks left at room temperature follow the same two-hour rule. If you are making a recipe that calls for raw egg and it sits out, the same timeline applies. In hot conditions, the window is one hour.
Raw or lightly cooked eggs carry a real risk of Salmonella infection. This is why some groups are advised to avoid raw eggs entirely. That includes pregnant women, infants, young children, older adults, and anyone with a weakened immune system. For these groups, the risk of serious illness from Salmonella is higher than for a healthy adult.
How Long Do Eggs Last In The Fridge?
Refrigerated eggs last far longer than most people expect. Stored properly at 40°F or below, fresh shell eggs keep for about three to five weeks from the date you bring them home. That timeline is a general food safety guideline, and it is why eggs often carry a pack date rather than a strict expiration date.
Here is the detail that trips people up. The sell-by or expiration date on the carton is often the last day the store should sell the eggs, not the last day they are safe to eat. Many cartons are fine for a week or more past that date if they have been refrigerated the whole time.
Storage matters. Keep eggs in their original carton on an inside shelf, not in the door. The door is the warmest part of the fridge because it opens and closes constantly. The carton also protects eggs from absorbing odors from other foods.
How Can You Tell If An Egg Has Gone Bad?
You can check freshness without cracking the egg. Place it in a bowl of water.
- A fresh egg sinks and lies flat on the bottom.
- An older egg stands upright or tilts.
- A spoiled egg floats to the top.
This works because eggshells are porous. Over time, moisture escapes and air seeps in, enlarging the air pocket inside. A floating egg has a large air pocket, which usually means it is old. Floating does not always prove spoilage, but it is a strong sign the egg is past its best.
Once you crack an egg, use your senses. A spoiled egg has an unmistakable rotten smell, and the white may look thin, watery, or discolored. If anything seems off, throw it out. Never taste a suspect egg to check.
Does Cooking Kill Bacteria On Eggs?
Cooking eggs thoroughly kills Salmonella. The key word is thoroughly. Eggs cooked until both the white and yolk are firm reach a temperature that destroys the bacteria.
Runny or soft-cooked eggs are a different situation. If the yolk is still liquid, the egg may not have reached a high enough internal temperature to kill bacteria throughout. For healthy adults, the risk from a lightly cooked egg is generally low but not zero. For the groups mentioned earlier, the risk is higher and worth taking seriously.
This is also why the two-hour rule still matters for eggs you plan to cook. Cooking kills bacteria, but it does not undo the toxins some bacteria produce, and it does not fix an egg that has been sitting out for hours. An egg left out overnight should be discarded, not cooked.
The Bottom Line
Two hours at room temperature is the limit for shell eggs and raw eggs. One hour if the temperature is above 90°F. In the fridge, eggs keep for about three to five weeks. When in doubt, throw it out. No egg is worth a bout of food poisoning.
Frequently Asked Questions
Can I put eggs back in the fridge after they have been out?
Yes, if they have been out for two hours or less. If they sat out longer, or more than one hour in hot weather, discard them.
How long can eggs sit out before they go bad?
Two hours at normal room temperature and one hour above 90°F. After that window, bacteria may have multiplied enough to cause illness.
Can you eat eggs that were left out overnight?
No. An egg left out overnight should be thrown away, even if it looks and smells fine. Bacteria can grow to unsafe levels without any visible sign.
Do eggs need to be refrigerated in the US?
Yes. US eggs are washed before sale, which removes the shell’s natural protective coating, so refrigeration is needed to keep them safe and fresh.

