Yes, atta should be refrigerated during the rainy season to prevent it from absorbing moisture and developing mold or attracting pests.
During the rainy season, humidity levels are significantly higher. Atta, being a finely ground flour, is highly susceptible to absorbing moisture from the air. This excess moisture creates a favorable environment for mold growth and can also attract insects like weevils. Refrigerating atta significantly slows down these processes. The cool, dry environment of the refrigerator helps to maintain the atta's dryness and freshness, preventing spoilage. To properly refrigerate atta, store it in an airtight container. This will further protect it from moisture and odors present in the refrigerator. Before using refrigerated atta, allow it to come to room temperature for about 30 minutes. This will help prevent the dough from becoming too stiff.
If you don't have enough refrigerator space, consider storing atta in an airtight container along with a desiccant packet (like those found in shoe boxes or vitamin bottles – make sure it's food-safe). This will help absorb excess moisture and keep the atta dry.