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Weather & Climate in Waimanalo, HI
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Waimanalo has a warm climate with an average annual temperature of 76°F (24°C). Winters average 72°F in January while summers reach 79°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 42.4 inches. 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 78 feet.
Temperature
72°F Jan (22°C)
79°F Jul (26°C)
| Annual Average | 75.8°F |
| 40% above US avg | |
| January Average | 72°F (22°C) |
| July Average | 79°F (26°C) |
| Sunny Days | 330 days/yr |
Geography
| Elevation | 78 ft (24 m) |
| Area | 4.4 sq mi (11.3 km²) |
| Population Density | 1,292/sq mi |
| Coordinates | 21.3421°N, 157.7302°W |
| Timezone | Pacific/Honolulu |
| County | Honolulu County County |
| Nearest Airport | Daniel K Inouye International (HNL) 12 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 24.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 98.8 / 100 |
| Social Vulnerability | 25.9 / 100 |
| Community Resilience | 62.6 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Relatively Low |
| Earthquake | Relatively High |
| Wildfire | Relatively High |
| Flood | Very High |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | No Rating |
| Winter Weather | No Rating |
| Lightning | Very High |
| Ice Storm | Relatively Moderate |
| Drought | Very Low |
| Cold Wave | No Rating |
| Landslide | Relatively High |
| Coastal Flood | Relatively Moderate |
| Tsunami | Relatively High |
| Volcano | No Rating |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
90 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.7.
| Mar 9, 2017 | 70 km NNE of Kualapu‘u, Hawaii | M4.7 | 101 km | 32 km |
| Jun 21, 2013 | 49 km N of Kualapu‘u, Hawaii | M4.5 | 80 km | 35 km |
| Aug 22, 2014 | 54 km SW of Maunaloa, Hawaii | M4.2 | 63 km | 6 km |
| May 20, 2005 | 28 km ENE of Ka‘a‘awa, Hawaii | M4.1 | 39 km | 10 km |
| Jun 7, 2014 | 5 km ESE of Maunaloa, Hawaii | M4.1 | 63 km | 0 km |
| Jun 1, 2006 | 66 km N of Kualapu‘u, Hawaii | M4.1 | 89 km | 31 km |
| Oct 23, 1991 | 29 km NW of Maunaloa, Hawaii | M4.0 | 36 km | 23 km |
| Oct 28, 1998 | 9 km W of M?kena, Hawaii | M4.0 | 146 km | 10 km |
| Jul 19, 2010 | 37 km S of Honolulu, Hawaii | M3.9 | 44 km | 3 km |
| Sep 17, 1996 | 109 km NNE of Waialua, Hawaii | M3.9 | 147 km | 32 km |
| Aug 15, 2002 | Oahu region, Hawaii | M3.9 | 15 km | 5 km |
| Jun 14, 1991 | 24 km NNE of Kualapu‘u, Hawaii | M3.8 | 82 km | 4 km |
| Feb 1, 2017 | 131 km SW of Lanai City, Hawaii | M3.8 | 148 km | 32 km |
| Sep 16, 2022 | 46 km S of Lanai City, Hawaii | M3.8 | 137 km | 14 km |
| May 29, 2014 | 56 km NNW of Kualapu‘u, Hawaii | M3.8 | 70 km | 30 km |
| Jul 29, 2013 | 11 km ESE of Waim?nalo Beach, Hawaii | M3.7 | 15 km | 33 km |
| Dec 31, 2009 | 50 km NE of Waialua, Hawaii | M3.7 | 141 km | 15 km |
| Feb 25, 2011 | 27 km SSE of East Honolulu, Hawaii | M3.7 | 34 km | 0 km |
| Sep 16, 2017 | 34 km NE of Marine Corps Base Hawaii - MCBH, Hawaii | M3.7 | 42 km | 10 km |
| Mar 28, 2016 | 1 km NNE of Kahului, Hawaii | M3.7 | 140 km | 25 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
6 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 4.
| Year | Name | Category | Max Wind | Closest |
| 2020 | Douglas | Category 1 | 92 mph | 86 km |
| 2018 | Lane | Category 1 | 75 mph | 276 km |
| 2016 | Lester | Category 1 | 75 mph | 220 km |
| 2014 | Ana | Category 1 | 81 mph | 203 km |
| 1992 | Iniki | Category 4 | 144 mph | 215 km |
| 1982 | Iwa | Category 1 | 92 mph | 225 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tornado History
21 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 2 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Mar 18, 1982 | EF2 | 36 km | 0.1 mi | 0 |
| Feb 11, 1982 | EF2 | 5 km | 0.1 mi | 0 |
| Feb 11, 1982 | EF2 | 2 km | 0.1 mi | 0 |
| Mar 26, 1988 | EF1 | 40 km | 0.2 mi | 0 |
| Jun 15, 1971 | EF1 | 20 km | 0.5 mi | 0 |
| Jan 28, 1971 | EF1 | 36 km | 1.7 mi | 0 |
| Mar 28, 1963 | EF1 | 48 km | 0.1 mi | 0 |
| Mar 1, 1963 | EF1 | 36 km | 0.1 mi | 0 |
| Jan 21, 1957 | EF1 | 40 km | 2.5 mi | 0 |
| Apr 23, 2015 | EF0 | 33 km | 1.0 mi | 0 |
| Mar 9, 2012 | EF0 | 6 km | 1.3 mi | 0 |
| Feb 11, 2009 | EF0 | 35 km | 0.4 mi | 0 |
| Mar 23, 2006 | EF0 | 98 km | 1.0 mi | 0 |
| Jan 25, 2004 | EF0 | 32 km | 1.0 mi | 0 |
| Feb 11, 1989 | EF0 | 33 km | 0.2 mi | 0 |
| May 13, 1986 | EF0 | 33 km | 0.2 mi | 0 |
| Sep 26, 1985 | EF0 | 41 km | 0.1 mi | 0 |
| Sep 23, 1983 | EF0 | 20 km | 0.1 mi | 0 |
| Nov 26, 1975 | EF0 | 33 km | 1.5 mi | 0 |
| May 27, 1973 | EF0 | 96 km | 0.1 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Nearby Volcanoes
1 volcano within 200 km. Closest: Haleakala (169 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Haleakala | Shield | 3,055 m (10,023 ft) | 1750 | 169 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Wildfire History
2 wildfires (100+ acres) recorded within 100 km. Largest: KAUNAKAKAI (8,355 acres, 2009).
| Year | Name | Acres Burned | Distance |
| 2009 | KAUNAKAKAI | 8,355 | 81 km |
| 2023 | MILILANI | 1,717 | 26 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 72°F (22°C) | 11.1 in | |
| February | 70°F (21°C) | 8.7 in | Coldest |
| March | 71°F (22°C) | 10.1 in | |
| April | 72°F (22°C) | 9.3 in | |
| May | 73°F (23°C) | 6.9 in | |
| June | 75°F (24°C) | 4.2 in | Driest |
| July | 79°F (26°C) | 5.1 in | Warmest |
| August | 77°F (25°C) | 6.5 in | |
| September | 77°F (25°C) | 4.7 in | |
| October | 76°F (25°C) | 8.0 in | |
| November | 74°F (23°C) | 11.9 in | Wettest |
| December | 72°F (22°C) | 11.3 in |
Waimanalo has a seasonal temperature swing of 9°F / from 70°F in February to 79°F in July. Total annual precipitation is 97.7 inches, with November being the wettest month (11.9") and June the driest (4.2").