The temperature difference between the highest and lowest parts of a refrigerator can vary depending on the model and design of the fridge. However, in a typical refrigerator, the coldest part is usually the top compartment, where the freezer is located.
The freezer compartment is designed to maintain a temperature around 0°F (-18°C) to keep foods frozen. The refrigerator compartment, which is located below the freezer, is slightly warmer to keep perishable foods fresh but still cold enough to slow down bacterial growth. As mentioned earlier, the ideal temperature range for the refrigerator compartment is between 35°F (1.7°C) and 38°F (3.3°C).
Given this typical configuration, the temperature difference between the top (freezer) and the bottom (refrigerator) of the fridge can be around 35°F to 38°F (or approximately 19°C to 21°C). Again, these values can vary based on the specific refrigerator model, the quality of the fridge's insulation, and the accuracy of the temperature control system. It's essential to keep the temperature settings at appropriate levels to ensure food safety and quality throughout the refrigerator. If you're concerned about the temperature distribution in your fridge, you can use a thermometer to measure the temperature in different areas and adjust the settings accordingly.