Dry season
Biscayne's tropical climate reflects its location in extreme South Florida. Southern Miami-Dade County is classified as having a tropical savanna climate in the Köppen-Geiger system, with the park bordering on a tropical monsoon climate. Seasons may be divided into the November–April dry season and the May–October wet season. Dry season temperatures average between with an average monthly rainfall of . Wet season temperatures average between with an average monthly rainfall of . The wet season roughly coincides with hurricane season, with frequent thunderstorms.