How long can you keep opened dry cornmeal unrefrigerated?

Opened dry cornmeal can be kept unrefrigerated for about 6 to 12 months if stored in a cool, dry place in an airtight container. Over time, it may lose flavor and freshness, so it's best to use it within the first few months for optimal taste. Always check for signs of spoilage, such as off odors or mold, before use.