A refrigerator should be set to a temperature between 35°F and 38°F (approximately 1.7°C to 3.3°C) for optimal food safety and freshness. The ideal temperature often recommended is around 37°F (about 3°C). This range keeps food fresh, prevents harmful bacterial growth, and minimizes food spoilage. It is important that the temperature never exceeds 40°F (4.4°C) to ensure safety. Additional tips include keeping the fridge well-stocked but not overcrowded to maintain temperature consistency, avoiding placing hot food directly in the fridge, and regularly checking door seals to prevent cold air from escaping.