Warmer temperature outside will lead to warmer temperatures inside. Appliances like refrigerators and freezers designed to stay cool will usually have to run longer. In some cases they tend to be more warmer inside in the summer then in the winter particularly on unusually warm days in the summer months.
Refrigerators should operate between 36 and 45 degrees Fahrenheit. The optimum temperature your refrigerator should be set at is 40 degrees Fahrenheit. Refrigerators set at lower temperatures risk freezing some items, especially those closer to fan. Other then fruits and vegetables which if possible should be placed in crisper pans. Temperatures between 40 and 45 degrees Fahrenheit give certain foods a higher risk of spoiling.
The freezer temperatures should be between -10 to 10 degrees Fahrenheit. The optimum temperature your freezer should be set at is between 0 and 5 degrees Fahrenheit.