Hāna weather by month and by hour

Hāna gets 67.7 inches of rain a year, close to six times what falls on Kīhei across the island, yet it averages 73.65°F, a little over a degree cooler. The trade winds hit Maui’s east coast first and drop their moisture on this side, and Hāna sits right in the middle of it.

Days reach 79 to 85°F and nights drop to 64 to 70°F, so a light layer is all the warmth you’ll need. Pack for rain instead: it falls on most days here, usually as short showers with sun in between.

Hāna in one card, before the month-by-month detail.

Hāna sits at the end of the Hāna Highway on Maui’s windward east coast. Its rain spreads across the whole year rather than bunching up in winter: March is the wettest month at 8.5 inches, June the driest at 3.5, and that driest month still out-rains Kīhei’s wettest (January, at 2.8 inches).

The extremes in the record are real but rare, and dated. Over its 1950-2012 record, the Hāna Airport gauge caught 17.57 inches in a single day on April 16, 1968, and 40.86 inches across the month of April 1989. Both stand far outside the monthly averages below.

For how the weather works across the whole of Maui, and why the windward side is the wet side, start with our main Maui weather guide. The same trade-wind split gives Maui 7 of the world’s 13 climate zones:

Maui Weather by Month: Which Side to Stay On

Kīhei gets rain on 36 days a year, Hāna on 267. How Maui weather works month by month, what a rain percentage really means, and which coast to pick.

Read more →

Monthly average Hāna weather: temperature, rainfall and cloud cover

Monthly average temperatures in Hāna run from 70°F (21°C) in January and February to 77°F (25°C) in August, with September and October just behind.

Those are whole-day averages. The average daily high runs from 79°F in winter to 85°F in early fall, and the average daily low from 64 to 70°F, a day-to-night swing of 14 to 15 degrees. The station record makes the same point over a longer span: between 1950 and 2012, the temperature at Hāna Airport never left the range of 50 to 94°F. It has never frozen here, and 90s are nearly unheard of.

NOAA’s gauge at Hāna Airport tells the same story: its 1991-2020 normals put daily highs between 77.3°F in February and 82.9°F in August, with 72.2 inches of rain a year. The airport gauge is a different measurement point and covers a different period than the atlas figure behind our table, so its rain total lands a few inches above the 67.7 we chart.

Cloud cover averages 64% across the year, cloudiest in March at 71%. January manages to be both the clearest month at 55% cloud and the second wettest at 7.8 inches, which fits the local pattern: showers move through fast rather than parking overhead.

Rain on 267 days a year, over an inch on only 15

Rain fell on about 267 days a year over the 1950-2012 record at Hāna Airport. Only 158 of those days reached a tenth of an inch, and only about 15 in a typical year topped a full inch. The rest were the kind the climate record itself describes as light and brief: a sudden sprinkle, then done.

July is the oddest line in that record: 26 rain-days, more than any other month, in the middle of the nominal dry season. A shower nearly every day, with little water in each one.

So pack a rain shell that stuffs into a daypack and skip the umbrella. When a shower starts, keep doing what you were doing: on a coast with 267 rain-days, waiting out every shower means waiting out the year.

Ten miles past Hāna, rainfall nearly triples

Hāna’s 68 to 72 inches a year is the dry end of its own coast. At Kīpahulu, ten miles down the road where the ʻOheʻo Gulch pools sit inside Haleakalā National Park, the Park Service puts average rainfall at 187 inches a year. The slopes above town see more than 300.

The maximum-rainfall belt on this side of Haleakalā sits at roughly 2,000 to 3,000 feet, well above both the town and the highway, so the land above you catches far more water than you do.

If you drive on to ʻOheʻo Gulch, plan on more rain than you saw in town, arriving more often, and know that the pools themselves are closed to entry under a standing safety closure: the half-mile Kūloa Point Trail reaches the view. Temperatures barely move down there, 70 to 80°F by day, so the rain shell is the only extra gear the second half of the drive asks for.

Hourly average Hāna weather: air temperature and cloud cover

The hourly curve is where Hāna splits from the leeward towns. Cloud cover stays between about 61% and 69% around the clock: it peaks near 69% around 9am, eases through the day, and reaches its low near 61% around 9pm. Kīhei swings from about 25% in the early morning to 60% by 2pm; Hāna’s cloud cover moves about eight points all day.

The cloudy end of the day here is the morning, not the afternoon. There is no reliably clear window and no reliably grey one either: the odds of cloud are roughly two in three whenever you look up, so plan stops by drive time, not by waiting on the sky.

Air temperature runs from about 70°F just before dawn to 79°F in the early afternoon. That is the hourly average across all days, so it sits inside the wider daily high and low above.

Hāna weather forecast

Everything on this page is a long-term average. Any given day in Hāna can land well off these numbers, and a passing shower and full sun are often minutes apart.

For the seven-day outlook, check the NOAA point forecast for Hāna.
Which forecast you read comes down to your zone. Hāna and the whole windward coast sit in Windward Haleakalā, one zone that climbs from the shore to the summit.

Hāna and the whole windward coast sit in the National Weather Service's Windward Haleakalā forecast zone (HIZ047), which runs from the shore to the summit. Zones: National Weather Service. Map by Love Big Island.

Weather summary for Hāna

Of the three Maui towns we chart, Hāna is the coolest at 73.65°F against about 75 in both Kīhei and Lāhainā, the wettest at 67.7 inches against 11.5 and 13.3, and the cloudiest at 64% against 39 and 40. If you’re driving the Hāna Highway as a day trip, judge the weather by this page, not by the sky over your hotel: a clear morning in Kīhei says nothing about the east coast.

Sources and methods

• Monthly and hourly temperature, rainfall and cloud: Hāna’s own point in the University of Hawaiʻi 250-metre atlas grid, from Giambelluca et al. (2014), Evapotranspiration of Hawaiʻi, via the Rainfall Atlas of Hawaiʻi. Annual figures are gridded estimates that interpolate between gauges.
• Rain-day count: Western Regional Climate Center period-of-record summary for the Hāna Airport gauge, 1950–2012.
• Forecast zone: National Weather Service public forecast zones (api.weather.gov).