Most refrigerators have adjustable temperatures, and experts recommend setting the temperature between 35 and 38 degrees Fahrenheit. Setting the temperature higher than this can lead to premature spoiling and potentially dangerous bacterial growth, and setting it lower can cause some food to freeze in cold spots.
Refrigerators are designed to lower the temperature of contents to prevent bacteria, which spoils food and can cause food illnesses, from spreading. Most bacteria survive at these low temperatures, but the low temperature slows their rate of growth significantly. However, refrigerators often have cool zones where temperatures can drop below the target temperature the user chooses; as a result, cold spots might cause food to freeze if the temperature is set too close to 32 degrees Fahrenheit.