You´re asking what the heck has my fridge to do with your climatic zone?
A lot of!

Climatic zones affect the power consumption of the refrigerator

The working conditions of the refrigerator in Florida or Puerto Rico and working conditions of the very same refrigerator in Canada are not the same. The temperature of the environment influences the operation of the refrigerator very much, regardless of how thick is the fridge door seal.

Buying new refrigerator based on the climatic class

When buying new fridge, always check it´s label (usually inside, on the left side) for the climatic class and choose that one that fits your average household temperature the best.

Below are the temperature ranges for the standardized climatic classes:

SN (sub-normal) - from 10 to 32 Celsius degrees (50 - 90 F);
N (normal) - from 16 to 32 Celsius degrees (60 - 90 F);
ST (sub-tropical) - from 18 to 36 Celsius degrees (65 - 97 F) and
T (tropical) - from 18 to 43 Celsius degrees (65 -110 F).