Refrigerating cut tomatoes is generally not recommended as it can negatively impact their flavor and texture. It's best to store them at room temperature and consume them as soon as possible.
When you cut a tomato, you expose its inner flesh to the air. Refrigerating cut tomatoes can cause several undesirable changes. First, the cold temperature disrupts the enzymes responsible for flavor development, leading to a bland and less aromatic taste. Second, the cell walls of the tomato break down in the cold, resulting in a mealy or mushy texture. Ideally, store whole, uncut tomatoes at room temperature, away from direct sunlight, to allow them to ripen fully and retain their optimal flavor and texture. If you must refrigerate cut tomatoes, wrap them tightly in plastic wrap or store them in an airtight container to minimize exposure to cold air and moisture. However, be aware that the flavor and texture will still be affected. Consume refrigerated cut tomatoes within a day or two for the best possible quality.
If you have to refrigerate cut tomatoes, let them sit at room temperature for about 30 minutes before using them. This can help to slightly improve their flavor and texture, although they won't be quite as good as if they had never been refrigerated.