Unopened yogurt has a shelf life of two to three weeks when it is stored in the refrigerator. Other types of unopened yogurt, such as reduced-fat yogurt and Greek yogurt, generally last one to two weeks when stored in the refrigerator.
Yogurt with fruit and drinkable yogurt typically last seven to 10 days in the refrigerator. Yogurt that has been opened has a shorter shelf life and lasts about a week in the refrigerator. The shelf life can be extended by storing yogurt in the freezer. Typically, unopened yogurt stays good in the freezer for up to two months, and opened yogurt stays good in the freezer for one month.