How long does Onion last at room temperature?

Onion lasts 1–2 months at room temperature.

How do you know if Onion has gone bad?

Onion has likely gone bad if you notice dark mould at the neck, soft brown spots; strong rotten or sour smell; mushy, slimy, or leaking layers. When in doubt, throw it out.

How long does cooked Onion last in the fridge?

Cooked Onion lasts 1–2 weeks refrigerated.

How Long Does Onion Last?

Onion keeps 1–2 months in the pantry, according to cited USDA/FDA storage references.

2 cited USDA/FDA/FSIS sources
Editorial review · Verified June 2026

1–2 months

Safe range

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Based on USDA/FSIS guidance:

Cut vegetables are perishable — refrigerate within 2 hours and use within a few days for best quality and safety.

Source

Discard onions that are soft, leaking, or mouldy at the centre. Cut onion should be kept chilled and used within a couple of weeks.

How to tell if it's gone bad

Look:Dark mould at the neck, soft brown spots
Smell:Strong rotten or sour smell
Texture:Mushy, slimy, or leaking layers

When in doubt, throw it out. If Onion smells, looks, or feels off — discard it. Food poisoning is not worth the risk.

How to store Onion

Keep Onion protected from heat, moisture, and contamination in the pantry. Use the pantry duration shown above for this food state.

Storage tips

Store whole onions in a cool, dark, airy spot away from potatoes. Refrigerate cut onions in a sealed container so they do not flavour everything nearby.

Is it still good?

Enter when you bought or opened it and where it's stored.

Common questions

How long does cooked Onion last in the fridge?: Cooked Onion lasts 1–2 weeks refrigerated.

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