 Under the Köppen climate classification , for tropical climates , a wet season month is defined as a month where average precipitation is 60 millimetres ( 2 @.@ 4 in ) or more . In contrast to areas with savanna climates and monsoon regimes , Mediterranean climates have wet winters and dry summers . Dry and rainy months are characteristic of tropical seasonal forests : in contrast to tropical rainforests , which do not have dry or wet seasons , since their rainfall is equally distributed throughout the year . Some areas with pronounced rainy seasons will see a break in rainfall mid @-@ season , when the intertropical convergence zone or monsoon trough moves to higher latitudes in the middle of the warm season . 
