Question: do onions last longer in the fridge?
Answer: Avoid Storing Whole Onions in the Fridge Curing helps remove excess moisture, allowing them to last longer. That's why onions are best stored in a cool but dry, dark and well-ventilated place. ... Peeled onions can be stored in the fridge for up to two weeks, while diced or sliced onions will only last for 7–10 days (4).