Waipahu's weather is mild throughout the year, with temperatures rarely dropping below 15°C or rising above 33°C. In winter months, January and February bring average highs around 21-22°C, while summer months, June to September, see consistent highs of around 25°C. Spring and autumn seasons have similar temperature ranges, with April and May averaging 23°C and October and November averaging 24°C. The cooler months are December and January, with temperatures dipping as low as 13°C in December, while the warmer months are July and August, but only slightly warmer than the rest of the year. Overall, Waipahu's temperature is relatively stable throughout the seasons.