<P> 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 . </P>
the dominant source of precipitation in the moist subtropical climate is
thunderstorms that build up due to the intense surface heating and strong subtropical sun angle