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Weather & Climate in Wailuku, HI
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Wailuku has a warm climate with an average annual temperature of 74°F (23°C). Winters average 70°F in January while summers reach 77°F in July / relatively mild seasonal variation. The area gets 330 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 23.3 inches (drier than the 38-inch national average). Air quality is rated Good with a median AQI of 24 / among the cleanest air in the country. The city sits at an elevation of 306 feet.
Temperature
70°F Jan (21°C)
77°F Jul (25°C)
| Annual Average | 74.1°F |
| 37% above US avg | |
| January Average | 70°F (21°C) |
| July Average | 77°F (25°C) |
| Sunny Days | 330 days/yr |
Geography
| Elevation | 306 ft (93 m) |
| Area | 5.7 sq mi (14.7 km²) |
| Population Density | 2,989/sq mi |
| Coordinates | 20.8855°N, 156.5036°W |
| Timezone | Pacific/Honolulu |
| County | Maui County County |
| Nearest Airport | Ellison Onizuka Kona International At Keahole (KOA) 88 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 24.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 93.1 / 100 |
| Social Vulnerability | 41.3 / 100 |
| Community Resilience | 86.4 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Hurricane | Relatively Low |
| Earthquake | Relatively Moderate |
| Wildfire | Relatively Moderate |
| Flood | Relatively High |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | No Rating |
| Winter Weather | Very Low |
| Lightning | Relatively High |
| Ice Storm | Very Low |
| Drought | Very Low |
| Cold Wave | No Rating |
| Landslide | Very Low |
| Coastal Flood | Relatively Low |
| Tsunami | Relatively High |
| Volcano | Relatively High |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
917 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.3.
| Apr 14, 2019 | 20 km E of Kalaoa, Hawaii | M5.3 | 147 km | 13 km |
| Jul 5, 2021 | 12 km NNW of Kukuihaele, Hawaii | M5.2 | 117 km | 27 km |
| Jun 27, 1998 | 51 km NW of Kalaoa, Hawaii | M5.1 | 93 km | 4 km |
| Mar 20, 1995 | Maui region, Hawaii | M4.8 | 90 km | 13 km |
| May 11, 1995 | 5 km NNE of Pa‘auilo, Hawaii | M4.8 | 150 km | 14 km |
| Apr 1, 2016 | 85 km NNE of Pa‘auilo, Hawaii | M4.7 | 148 km | 33 km |
| Mar 9, 2017 | 70 km NNE of Kualapu‘u, Hawaii | M4.7 | 105 km | 32 km |
| Aug 2, 1990 | 22 km SE of Waikoloa, Hawaii | M4.7 | 150 km | 16 km |
| Jan 25, 2022 | 10 km NNE of Wailua, Hawaii | M4.7 | 44 km | 41 km |
| May 22, 2022 | 3 km NW of H?lualoa, Hawaii | M4.7 | 149 km | 9 km |
| Feb 17, 2017 | 25 km WNW of Puako, Hawaii | M4.7 | 102 km | 40 km |
| Mar 20, 2016 | 13 km SE of Waikoloa, Hawaii | M4.6 | 143 km | 30 km |
| Nov 22, 1998 | 30 km NW of H?w?, Hawaii | M4.5 | 70 km | 26 km |
| Apr 5, 2015 | 12 km W of Kalaoa, Hawaii | M4.5 | 133 km | 8 km |
| Jun 21, 2013 | 49 km N of Kualapu‘u, Hawaii | M4.5 | 95 km | 35 km |
| Aug 7, 2014 | 12 km NNE of Puako, Hawaii | M4.5 | 116 km | 15 km |
| Jul 18, 1996 | 17 km SSE of Waimea, Hawaii | M4.4 | 146 km | 12 km |
| Jun 3, 1999 | Island of Hawaii, Hawaii | M4.4 | 142 km | 26 km |
| Jul 27, 2006 | 36 km SSW of M?kena, Hawaii | M4.4 | 60 km | 31 km |
| Aug 12, 1993 | 29 km WSW of H?w?, Hawaii | M4.3 | 93 km | 42 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
5 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 1.
| Year | Name | Category | Max Wind | Closest |
| 2024 | Hone | Category 1 | 86 mph | 255 km |
| 2020 | Douglas | Category 1 | 92 mph | 78 km |
| 2018 | Lane | Category 2 | 104 mph | 283 km |
| 2016 | Lester | Category 1 | 81 mph | 187 km |
| 2014 | Ana | Category 1 | 81 mph | 288 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tornado History
7 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF0.
| Date | Rating | Distance | Path | Fatalities |
| Feb 11, 2011 | EF0 | 14 km | 0.0 mi | 0 |
| Sep 23, 2008 | EF0 | 46 km | 0.8 mi | 0 |
| Mar 25, 2006 | EF0 | 16 km | 1.0 mi | 0 |
| Mar 23, 2006 | EF0 | 53 km | 1.0 mi | 0 |
| Jan 29, 1974 | EF0 | 53 km | 0.1 mi | 0 |
| May 27, 1973 | EF0 | 43 km | 0.1 mi | 0 |
| Apr 22, 1967 | EF0 | 6 km | 0.1 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Tsunami History
1 tsunami recorded within 500 km. Highest wave on record: 0.1 m (0 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 2006 | HAWAII | Earthquake | 0.1 m | — | 127 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
4 volcanoes within 200 km. Closest: Haleakala (33 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Haleakala | Shield | 3,055 m (10,023 ft) | 1750 | 33 km |
| Hualalai | Shield | 2,523 m (8,278 ft) | 1801 | 148 km |
| Mauna Kea | Shield | 4,205 m (13,796 ft) | -2460 | 160 km |
| Mauna Loa | Shield | 4,170 m (13,681 ft) | 1984 | 183 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Wildfire History
10 wildfires (100+ acres) recorded within 100 km. Largest: KAUNAKAKAI (8,355 acres, 2009).
| Year | Name | Acres Burned | Distance |
| 2009 | KAUNAKAKAI | 8,355 | 56 km |
| 2019 | WAIKO RD | 7,915 | 10 km |
| 2016 | MAALAEA | 6,028 | 11 km |
| 2023 | PULEHU | 5,712 | 15 km |
| 2019 | CENTRAL MAUI | 5,530 | 13 km |
| 2016 | KAHIKINUI | 5,341 | 39 km |
| 2007 | OLOWALU | 2,549 | 14 km |
| 2007 | UPPER WAIOHULI | 2,376 | 29 km |
| 2023 | LAHAINA | 2,129 | 17 km |
| 2022 | KAUAULU VALLEY | 1,920 | 14 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 70°F (21°C) | 10.1 in | Wettest |
| February | 66°F (19°C) | 7.9 in | Coldest |
| March | 67°F (20°C) | 9.0 in | |
| April | 68°F (20°C) | 9.6 in | |
| May | 69°F (21°C) | 5.8 in | |
| June | 71°F (22°C) | 3.6 in | Driest |
| July | 77°F (25°C) | 4.7 in | Warmest |
| August | 73°F (23°C) | 5.7 in | |
| September | 73°F (23°C) | 4.1 in | |
| October | 72°F (22°C) | 6.4 in | |
| November | 70°F (21°C) | 10.0 in | |
| December | 68°F (20°C) | 9.1 in |
Wailuku has a seasonal temperature swing of 11°F / from 66°F in February to 77°F in July. Total annual precipitation is 85.8 inches, with January being the wettest month (10.1") and June the driest (3.6").