Marble Bar has a hot desert climate (Köppen "BWh") with sweltering summers and warm winters. Most of the annual rainfall occurs in the summer. The town set a world record of most consecutive days of or above, during a period of 160 days from 31 October 1923 to 7 April 1924. Although annual temperatures indicate Marble Bar should be within the tropics, with a July (winter) mean of , it does not have the high precipitation requirements for hot-weather climates to sustain tropical vegetation.