the dominant source of precipitation in the moist subtropical climate is
Humid subtropical climate Rainfall often shows a summer peak, especially where monsoons are well developed, as in Southeast Asia and Florida (US). Other areas have a more uniform or varying rainfall cycles, but consistently lack any predictably dry summer months. Most summer rainfall occurs during thunderstorms that build up due to the intense surface heating and strong subtropical sun angle. Weak tropical lows that move in from adjacent warm tropical oceans, as well as infrequent tropical storms often contribute to summer seasonal rainfall peaks. Winter rainfall is often associated with large storms in the westerlies that have fronts that reach down into subtropical latitudes. However, many subtropical climates such as southeast Asia or Florida have very dry winters, with frequent brush fires and water shortages.
Tropical rainforest climate Tropical rainforests have a type of tropical climate in which there is no dry season—all months have an average precipitation value of at least 60 mm (2.4 in). Tropical rainforests have no summer or winter; it is typically hot and wet throughout the year and rainfall is both heavy and frequent. One day in an equatorial climate can be very similar to the next, while the change in temperature between day and night may be larger than the average change in temperature during the year.[1]