How Long Are Onions Good For?
Onions can last for a long time if stored properly. Whole onions can last for up to 2 months in a cool, dry area away from light and humidity. Peeled or cut onions should be stored in an airtight container in the fridge and can last for up to 7-10 days. Cooked onions should also be stored in an airtight container in the fridge and can last for up to a week.