แIntroduction
Within the Köppen Climate Classification System, tropical moist climates extend northward and southward from the equator to about 15 to 25° of latitude. In these climates, all months have average temperatures greater than 18° Celsius (64° Fahrenheit). Annual precipitation is often greater than 1500 mm (59 in.).
See link for high reslution Köppen Climate Map to see the spatial distribution of the A climate type.
Three minor Köppen climate types exist in the A group. These three categories of tropical moist climate are distinguished on the seasonal distribution of rainfall.