^ âeucatastropheâ (US) / âeucatastropheâ (UK) in Oxford Dictionaries, Oxford University Press.
A: Chopped or sliced onions can be stored in a sealed container in your refrigerator at the proper temperature of 40Â°F or below for 7 to 10 days (Source: USDA). For pre-cut fresh or frozen products, always use and follow manufactures use by dates.
Onions: Onions will last longer in the fridge, but not without cost. Like tomatoes, your onions will soften a bit if you put them in the fridge, and they won't be quite as crisp. Also, they'll make your other food smell like onions.nions: Onions will last longer in the fridge, but not without cost. Like tomatoes, your onions will soften a bit if you put them in the fridge, and they won't be quite as crisp. Also, they'll make your other food smell like onions.