Store whole and cut onions safely in 6 steps
Keep whole dry onions ventilated and out of sunlight; refrigerate peeled or cut onions in a sealed container.
Official source: Store whole and cut onions safely in 6 steps
Original-source link card from Oregon State University Extension
Open source ↗Oregon State University Extension distinguishes whole dry onions from peeled or cut onions. Moisture, soft spots and odor should prompt inspection.