Many people ask if it’s good to refrigerate olive oil. If an oil is exposed to extreme cold during storage or shipping, it may get cloudy temporarily. However, that should not affect quality, and the oil is ready to use once it returns to room temperature. Some research suggests that repeated heating and cooling, as would happen with refrigerating between each use, puts stress on the oil and doesn’t extend the shelf life. Oils degrade naturally over time, and an olive oil past its prime will eventually become rancid.
To summarize: Store your olive oil in a cool, dark cupboard or pantry, and use opened bottles within a few months.