Thank you for the question. Ice cream melts because over half of it is water, which melts at 32 degrees Fahrenheit. Ice cream also contains other ingredients, such as fat and sugar, which lower the melting point, but just by a few degrees. A typical freezer stays around 0 degrees, and a refrigerator around 40 degrees, which is why ice cream will stay frozen in the freezer and melt in the refrigerator.