Historical weather data, all-time temperature records, and monthly climate averages for Kahului, HI. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Kahului is a reliably warm, mostly dry day — 85 years of records put the average high at 82° with only a 28% chance of rain. The date's range is pretty tight, from a 57° low in 2007 to an 87° high back in 1959, which tells you how stable Maui's weather tends to be.
Kahului's all-time extremes are surprisingly modest for a tropical destination — the hottest day on record is just 97°, set in July 2019, while the coldest ever recorded was 48° in January 1969. The real drama comes from rain: a single day in March 2026 dropped 7.4 inches on the area.
Kahului is warm year-round, with monthly average highs that never dip below 80° — even in the coolest weeks of late January. Peak heat arrives in August, when highs average 88°, and the wettest stretch is the final week of December, averaging nearly an inch of rain. For the driest, most comfortable visit, spring through early summer is the sweet spot.