Root Vegetable Storage
Store root vegetables in cool cabinets.
Dry onions, potatoes, sweet potatoes, and winter squash usually keep best in dark place at cool temperatures, preferable around 32 to 60 degrees F.
Never store potatoes, onions or other root vegetables beneath the kitchen sink or in cabinets through which water pipes, drain pipes or heating pipes pass. Also, these areas attract insects and possibly rodents through openings that are almost impossible to seal adequately. Any leakage from the pipes can damage the vegetables.
Put dishes or pans in the cabinets over the range, near the dishwasher or over the refrigerator. In these places, the temperature is too warm for root vegetables and other food.
Source: Cupboard Approximate Storage Times, Kansas State University