The maritime tropical climate is hot and humid, with little seasonal temperature change. Diurnal variations generally range between 21° and 34° C (70° and 93° F ). Trade winds from the northeast cool the high temperatures from December through March.
Rainfall averages about 30–38 cm (12–15 in) per month, with October and November the wettest and December to April the driest. Average rainfall increases from the north to the south; the northern atolls average 178 cm (70 in) annually, compared with 432 cm (170 in) in the southern atolls.