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Weather & Climate in Aiea, HI

Temperature, precipitation, air quality, natural hazards, and monthly weather data.

Aiea has a warm climate with an average annual temperature of 78°F (26°C). Winters average 74°F in January while summers reach 82°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 16.4 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 228 feet.

Temperature

74°F Jan (23°C) 82°F Jul (28°C)
Annual Average78.0°F
44% above US avg
January Average74°F (23°C)
July Average82°F (28°C)
Sunny Days330 days/yr

Geography

Elevation228 ft (69 m)
Area1.7 sq mi (4.3 km²)
Population Density5,515/sq mi
Coordinates21.3853°N, 157.9248°W
TimezonePacific/Honolulu
CountyHonolulu County County
Nearest AirportDaniel K Inouye International (HNL)
5 miles away

Precipitation & Snow

Annual Rainfall 16.4"
57% below US avg
Wettest Month (Jan) 9.65"
Driest Month (Jun) 2.80"

Air Quality

AQI Median24.0
RatingGood

Natural Hazard Risk

Overall RiskRelatively High
Risk Score98.8 / 100
Social Vulnerability25.9 / 100
Community Resilience62.6 / 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

66 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.7.

Mar 9, 2017 70 km NNE of Kualapu‘u, Hawaii M4.7 117 km 32 km
Jun 21, 2013 49 km N of Kualapu‘u, Hawaii M4.5 98 km 35 km
Aug 22, 2014 54 km SW of Maunaloa, Hawaii M4.2 74 km 6 km
May 20, 2005 28 km ENE of Ka‘a‘awa, Hawaii M4.1 46 km 10 km
Jun 7, 2014 5 km ESE of Maunaloa, Hawaii M4.1 84 km 0 km
Jun 1, 2006 66 km N of Kualapu‘u, Hawaii M4.1 105 km 31 km
Oct 23, 1991 29 km NW of Maunaloa, Hawaii M4.0 57 km 23 km
Jul 19, 2010 37 km S of Honolulu, Hawaii M3.9 46 km 3 km
Aug 15, 2002 Oahu region, Hawaii M3.9 34 km 5 km
Jun 14, 1991 24 km NNE of Kualapu‘u, Hawaii M3.8 103 km 4 km
May 29, 2014 56 km NNW of Kualapu‘u, Hawaii M3.8 86 km 30 km
Jul 29, 2013 11 km ESE of Waim?nalo Beach, Hawaii M3.7 35 km 33 km
Feb 25, 2011 27 km SSE of East Honolulu, Hawaii M3.7 49 km 0 km
Sep 16, 2017 34 km NE of Marine Corps Base Hawaii - MCBH, Hawaii M3.7 54 km 10 km
Apr 9, 1993 16 km WNW of Lanai City, Hawaii M3.6 104 km 1 km
Jun 4, 2018 13 km S of East Honolulu, Hawaii M3.6 33 km 32 km
Jun 15, 2013 122 km WSW of Ko Olina, Hawaii M3.6 143 km 17 km
Apr 30, 1993 31 km N of Kualapu‘u, Hawaii M3.5 95 km 15 km
Aug 23, 2017 24 km NNE of Waialua, Hawaii M3.5 133 km 13 km
May 21, 2011 118 km SW of Lanai City, Hawaii M3.5 142 km 16 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 94 km
2018 Lane Category 1 75 mph 278 km
2016 Lester Category 1 75 mph 234 km
2014 Ana Category 1 81 mph 188 km
1992 Iniki Category 4 144 mph 195 km
1982 Iwa Category 1 92 mph 213 km
Source: NOAA IBTrACS (Category 1+, 1980–2026).

Tornado History

19 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 2 injuries.

Date Rating Distance Path Fatalities
Mar 18, 1982 EF2 17 km 0.1 mi 0
Feb 11, 1982 EF2 22 km 0.1 mi 0
Feb 11, 1982 EF2 16 km 0.1 mi 0
Mar 26, 1988 EF1 19 km 0.2 mi 0
Jun 15, 1971 EF1 7 km 0.5 mi 0
Jan 28, 1971 EF1 17 km 1.7 mi 0
Mar 28, 1963 EF1 34 km 0.1 mi 0
Mar 1, 1963 EF1 18 km 0.1 mi 0
Jan 21, 1957 EF1 21 km 2.5 mi 0
Apr 23, 2015 EF0 15 km 1.0 mi 0
Mar 9, 2012 EF0 22 km 1.3 mi 0
Feb 11, 2009 EF0 15 km 0.4 mi 0
Jan 25, 2004 EF0 12 km 1.0 mi 0
Feb 11, 1989 EF0 15 km 0.2 mi 0
May 13, 1986 EF0 13 km 0.2 mi 0
Sep 26, 1985 EF0 32 km 0.1 mi 0
Sep 23, 1983 EF0 4 km 0.1 mi 0
Nov 26, 1975 EF0 19 km 1.5 mi 0
Sep 22, 1965 EF0 17 km 0.1 mi 0
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Nearby Volcanoes

1 volcano within 200 km. Closest: Haleakala (189 km).

Name Type Elevation Last Eruption Distance
Haleakala Shield 3,055 m (10,023 ft) 1750 189 km
Source: Smithsonian Institution Global Volcanism Program (GVP).

Wildfire History

1 wildfire (100+ acres) recorded within 100 km. Largest: MILILANI (1,717 acres, 2023).

Year Name Acres Burned Distance
2023 MILILANI 1,717 11 km
Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 74°F (23°C) 9.7 in Wettest
February 70°F (21°C) 6.4 in Coldest
March 71°F (21°C) 7.4 in
April 72°F (22°C) 6.5 in
May 73°F (23°C) 4.3 in
June 75°F (24°C) 2.8 in Driest
July 82°F (28°C) 3.9 in Warmest
August 77°F (25°C) 4.2 in
September 77°F (25°C) 3.2 in
October 76°F (24°C) 6.3 in
November 74°F (23°C) 9.3 in
December 72°F (22°C) 8.3 in

Aiea has a seasonal temperature swing of 12°F / from 70°F in February to 82°F in July. Total annual precipitation is 72.1 inches, with January being the wettest month (9.7") and June the driest (2.8").

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