The main factor determining a region's climate is __________.
All of the above
Many factors influence the climate of a region. The most important factor is latitude because different latitudes receive different amounts of solar radiation.
The maximum annual temperature of the Earth, showing a roughly gradual temperature gradient from the low to the high latitudes.
It's easy to see the difference in temperature at different latitudes in the Figure above. But temperature is not completely correlated with latitude. There are many exceptions. For example, notice that the western portion of South America has relatively low temperatures due to the Andes Mountains. The Rocky Mountains in the United States also have lower temperatures due to high altitudes. Western Europe is warmer than it should be due to the Gulf Stream.