Maui records about 380mm of rain across roughly 95 wet days a year, which is a 26% chance on an average day. December is the wettest month at 58mm (15% of the annual total) and June the driest at 12mm. Local rain type: brief showers. Maui's west side (Kaanapali, Lahaina) is reliably dry and sunny. The Road to Hana on the east side receives heavy rain that feeds spectacular waterfalls. A light rain jacket is enough for most visitors.
Chance of rain on an average day: 26%
Rainfall climatology for Maui. The live hour-by-hour answer for today loads at the top of this page from Open-Meteo and refreshes through the day — the figures below describe a typical year, not today.
Conditions on this page are recalculated from the latest forecast every time it is opened, for the current date in the location's own time zone. Showing .
| Annual rainfall | 380mm |
| Rain days per year | 95 |
| Odds on an average day | 26% |
| Wettest month | December — 58mm over 14 days |
| Driest month | June — 12mm over 3 days |
| Rain type | brief showers |
| Best dry window | June through August offers the driest conditions with minimal showers even on the windward side. |
| Worst rain window | December brings the most rain — the Road to Hana waterfalls peak in power but some stream crossings become impassable. |
December delivers 383% more rain than June (58mm vs 12mm). That gap is the difference between planning around showers and ignoring them.
No single month holds more than 15% of the annual total, so rain in Maui is spread through the year — there is no season you can rely on being dry.
Maui rain typically comes as discrete showers, so a compact umbrella and a flexible plan are usually enough.
Rain falls on about 14 days in December against 3 in June — the frequency swing matters more for planning than the millimetre totals.
Climate normals. Use them to judge whether today's live forecast at the top of the page is typical or unusual for the season.
| Month | Rainfall | Rain days | Chance on a given day | Highs |
|---|---|---|---|---|
| January | 55mm | 13 | 43% | 27°C |
| February | 48mm | 11 | 37% | 27°C |
| March | 42mm | 10 | 33% | 28°C |
| April | 25mm | 6 | 20% | 28°C |
| May | 18mm | 4 | 13% | 30°C |
| June | 12mm | 3 | 10% | 30°C |
| July | 15mm | 4 | 13% | 31°C |
| August | 18mm | 4 | 13% | 31°C |
| September | 22mm | 5 | 17% | 30°C |
| October | 38mm | 9 | 30% | 30°C |
| November | 50mm | 12 | 40% | 28°C |
| December | 58mm | 14 | 47% | 28°C |
Rain probability is the chance that at least 0.2mm falls at your location — not how long it rains. For Maui we combine the hourly probability curve, expected volume in millimetres, and the city's own rainfall record into a single umbrella verdict.
| Factor | Weight | What it measures |
|---|---|---|
| Hourly probability | 40% | Peak and sustained chance of measurable rain across the next 24 hours. |
| Expected volume | 30% | Total millimetres, which separates a passing shower from a genuine soaking. |
| Timing & duration | 20% | When rain starts, when it eases, and the longest continuous dry window. |
| Local rain type | 10% | Drizzle, brief showers, thunderstorms or monsoon — each needs different gear. |
Live hourly values come from Open-Meteo and refresh through the day. Monthly rainfall figures are climate normals, so they describe a typical year rather than a forecast.
Maui records rain on roughly 95 days a year — about a 26% chance on any given day — totalling around 380mm.
December, with about 58mm over 14 rain days. That is 15% of the entire year's rainfall in a single month.
June is the driest month at 12mm across roughly 3 days. June through August offers the driest conditions with minimal showers even on the windward side.
Maui's west side (Kaanapali, Lahaina) is reliably dry and sunny. The Road to Hana on the east side receives heavy rain that feeds spectacular waterfalls. A light rain jacket is enough for most visitors.
No. Probability is the chance that at least 0.2mm of rain falls at your location at some point in the period. Check the expected millimetres alongside it: 40% with 0.4mm is a passing shower, 40% with 12mm is a soaking.