Some brands of peanut butter need to be refrigerated, and other brands don’t. Be sure to check the label. In general brands that don’t require mixing don’t require refrigeration. Some types of peanut butter require you to mix the peanut paste with the oil that separates to the top. These brands usually require refrigeration.
Peanut butter does not need to be stored in a refrigerator after opening. It will keep for a couple of months in a cabinet if the lid is on tight. It shouldn't be kept in the heat. A cool pantry is best.
Peanut Butter does not need to be refrigerated. Some like it in the fridge but it will be a bit harder and not as easy to spread. If you keep it out of the fridge, it will stay creamy and better to spread with.
No, peanut butter does not need to be refrigerated. Once open, peanut butter can be kept in the cupboard for up to 3 months. Many people do like to refrigerate their peanut butter, if you do so it can be kept after opening for 3-4 months in the refrigerator.