Onions last 1 month in the pantry, 2 months in the fridge, and 10–12 months in the freezer.
Shelf life at a glance
Bars show the longest recommended time for each place. Scale runs from 1 hour to 2 years.
- 1Use within days
- 2Keeps a week or two
- 3Keeps for months
- 4Keeps a long time
Based on the longest fridge or pantry time.
About 30 more days in the fridge.
About 15 more days in the fridge.
It's inside the safe window but near the end. Eat it today or freeze it now.
Past the recommended fridge time. Even if it looks and smells fine, throw it out.
Past the recommended fridge time. Even if it looks and smells fine, throw it out.
Counted from the day it was cooked, opened or bought. Assumes a fridge at 4 °C (40 °F) or colder.
Onions storage times by method
| Method | Duration | Temperature | Container | Notes |
|---|---|---|---|---|
| Pantry / counter | 1 month | 68–72°F | Airtight | cool, dry place |
| Refrigerator | 2 months | ≤ 40°F / 4°C | Airtight | at or below 40°F (4°C) |
| Freezer | 10–12 months | 0°F / -18°C | Freezer bag or wrap | at 0°F; quality, not safety |
Where to store onions
The crisper drawer holds humidity, which keeps produce from wilting.
Onions shelf life, answered
How long do onions last in the fridge?
2 months at 4°C (40°F) or colder. Keep it sealed so it does not pick up moisture or odours.
How long do onions last in the freezer?
10–12 months for best quality at -18°C (0°F). Frozen food stays safe indefinitely; after that, texture and flavour fade.
How long do onions last at room temperature?
1 month in a cool, dry place.
How long is onions good for past the expiration date?
Onions past their best-by date are usually safe if stored well; check smell, look and taste before using.
How can you tell if onions are bad?
Fermented, sour or musty odour. Soft, mushy or leaking spots, or wrinkled skin with soft flesh. Dark bruising that spreads, or browning inside.
Signs onions have gone bad
Smell
Fermented, sour or musty odour.
Texture
Soft, mushy or leaking spots, or wrinkled skin with soft flesh.
Colour
Dark bruising that spreads, or browning inside.
Mould
White, grey or green fuzz — discard soft produce; cut firm produce generously.
Can you freeze onions?
- 1Step 1
Wash, dry and cut into pieces; blanch most vegetables for 1–3 minutes first.
- 2Step 2
Spread on a tray to freeze individually, then bag and press out air.
- 3Step 3
Use from frozen in cooking or smoothies; thawed produce is soft.
How to thaw onions
In the fridge
Move it to the fridge the night before; texture holds best.
At room temperature
Only for shelf-stable foods; perishable food should not thaw on the counter.
From frozen
Many foods go straight into soups, sauces, smoothies or the oven.
Onions left out overnight
Onions are shelf-stable. A night on the counter is fine — keep them cool, dry and away from sunlight.
Best-by and use-by dates on onions
Best-by and sell-by
FoodKeeper gives unopened onions 1 month in the pantry or 2 months in the fridge, counted from the day you buy it. "Best-by" and "sell-by" describe quality and stock rotation, not safety; only infant formula carries a federally required use-by date.
Past the date
Onions past their best-by date are usually safe if stored well; check smell, look and taste before using.
How to store onions
- Store unwashed; wash just before eating.
- Keep ethylene producers (apples, bananas, avocados) away from produce that over-ripens.
- Refrigerate once cut, in a covered container.
Onions vs similar foods
Check any food in seconds: when your leftovers expire, and whether something left out is still safe.
Similar foods
All vegetables → Can you freeze… hub → Leftover calculator →Freezer time calculator →Left-out checker →