Coffee Beans That have been Left Out in the Cold will Lose Their Aroma and Flavor.
Do not store your coffee in the refrigerator, regardless of whether it is in K-cups, whole beans, or ground form. It is recommended by the National Coffee Association that coffee beans be stored in an environment that is free from direct sunlight, heat, and moisture (NCA). The flavor of the coffee will be ruined if it is damp.
The coffee beans should be stored in a location that is cool and dry to ensure their safety. They will rot quickly if they are not kept in an airtight container while being stored. When coffee beans are subjected to temperatures that are either too low, too high, or both, it is possible for them to lose some or all of their flavor.