What is the shelf life of opened cheddar cheese?

Opened cheddar cheese typically has a shelf life of about 3 to 4 weeks when stored properly in the refrigerator. It's important to keep it wrapped tightly in plastic wrap or aluminum foil to prevent moisture loss and contamination. If the cheese develops an off smell, discoloration, or mold (other than the natural mold that some aged cheeses may have), it's best to discard it. For longer storage, cheddar can be frozen, though this may affect its texture.